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"BOL" inside of a Diamond? Japan mark?

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#1 Glassthrower

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Posted 16 November 2006 - 06:41 PM

I saw a strange symbol on a scope label today. It wasn't the typical "circle T" or "diamond V", it looks like three letters inside a diamond and the letters are (I think) BOL.

What glassmaker does this signify?

Thanks and clear skies...

MikeG

#2 dbledsoe

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Posted 16 November 2006 - 08:17 PM

Mike,

I don't know about the BOL in a diamond but I have a Mayflower branded 60mm f/15 scope with SYW in a diamond. Naturally I have no idea what that signifies.

Don

#3 Steve_M_M

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Posted 16 November 2006 - 09:41 PM

Here's a BOL on an Old Bushnell. I do not know what it means, but all BOL's I have seen are good quality. SYW's too. How about circle K? I sure wish we had a code map :confused:

Steve

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#4 tybee

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Posted 16 November 2006 - 10:19 PM

My 50+ year old Swift Binoculars have "TJK" inside of a diamond. Japan is stamped underneath. They’re high quality too.

#5 hub

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Posted 16 November 2006 - 11:15 PM

My old Japan-made Manon refractor has an "APL" inside of a diamond. Very good scope. I have no idea what the APL stands for, though.

John

#6 microbes

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Posted 16 November 2006 - 11:23 PM

three letters inside a diamond and the letters are (I think) BOL.



SYW in a diamond



Binoculars have "TJK" inside of a diamond.



all BOL's I have seen are good quality. SYW's too. How about circle K? I sure we had a code map



About half way down this page is a series of links that lead to "Japan... Trademarks of optical manufacturers" that is broken down into more than 20 pages, each with pictures of many trademarks.

http://www.europa.co...pe/binotele.htm

I could not find my 16X50 bino's that are marked in one place with "S.O.C." in a triangle and in another place with a diamond with a circle inside it with a Y inside the circle in any of the linked pages above (but I did find one that is "SOC TOKYO" in a shield that is from Showa Optical Co. Ltd.), but there are hundreds of trademarks and you my have better luck.

http://img329.images...8/16x50d6dh.jpg" border="0

http://img403.images...1/16x50f5le.jpg" border="0

#7 tybee

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Posted 17 November 2006 - 06:39 AM

What a great link. I didn’t realize there were so many different optical manufactures in Japan. Apparently the trademark not only will indicate the manufacture but also the year of manufacture. Unfortunately I don’t see the diamond “TJK” logo so apparently there are still many that aren’t listed.

#8 Glassthrower

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Posted 17 November 2006 - 08:40 AM

I've decided not to bid on the scope that made me start this thread.

The scope in question is a very old Bushnell SkyChief Jr. - not the later model.

The seller has it mispelled in the listing and it is sitting in an obscure eBay store. If anyone is interested in it, PM me and I will send the link.

Thanks for the feedback and the link (I had used that site to identify old Japanese binoculars, but I overlooked it for scopes)

Clear dark skies...

MikeG

#9 microbes

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Posted 17 November 2006 - 09:38 AM

The scope in question is a very old Bushnell SkyChief Jr. - not the later model.



Not sure what the Jr. model was and I don't need another SkyChief, but the older made in japan ones are definatly a few steps up quality wise from the typical dept. store scopes made now-a-days.

#10 dbledsoe

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Posted 17 November 2006 - 08:17 PM

A Layfayette branded D60 f800 I have is a circle T. Optically it isn't very good, shows astigmatism. I had another same scope but different brand name that was a circle T and it was not very good optically either, if that means anything.

I also have a Bushnell "Triple Tested" D60 f800 that has no markings, other than Bushnell that is identical to a D60 f800 "Jupiter" (Ashi Optical Company i.e., Pentax) except one has a black wrinkle pinted tube finish (the Bushnell) and one is gloss white (the Pentax) and the Bushnell, in spite of having edge chips in the objective, is superior optically to the Pentax, which has a prfect looking onjective... for what that's worth. :shrug:

Don

#11 Jae

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Posted 17 November 2006 - 09:20 PM

Very interesting, my Bushnell is same as the one pictured above but with an "APL" in tiny engraving. It also says "Triple Tested" and it is optically excellent, every bit as good as the Astro Optical/Tasco 7TE.

I'll take a pic later and post it. I've got cable modem problems right now.

Jae

#12 Glassthrower

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Posted 17 November 2006 - 09:28 PM

Maybe we should combine the considerable knowledge of this group and start a working thread to document the known Japanese "maker's marks" with some comments about each? I'd volunteer my limited input.

Here is a pic of the scope label in question...

MikeG

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#13 Steve_M_M

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Posted 17 November 2006 - 10:48 PM

Bushnell Optical Laboratories? :jump:

#14 Jae

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Posted 17 November 2006 - 11:13 PM

Here's mine !! "APL"

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#15 Jae

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Posted 17 November 2006 - 11:17 PM

Check out the detail in how the slo mo cable connects.

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#16 Jae

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Posted 17 November 2006 - 11:18 PM

Instead of a set screw, it screws on....anybody seen this elsewhere ?

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#17 Steve_M_M

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Posted 18 November 2006 - 12:05 AM

Great comparison opportunity....

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#18 Steve_M_M

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Posted 18 November 2006 - 12:09 AM

Looks quite similar, but mine does not have the cool thread on slo motion control.

#19 square_peg

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Posted 18 November 2006 - 01:20 AM

That's a nice looking mount! :love:

#20 hub

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Posted 18 November 2006 - 10:14 PM

JAE, my sector gear alt-az mounted 60mm Manon has the screw slow motion cable for the altitude axis. It's neat in appearance and more secure than the usual set screw method of attachment.

John

#21 dbledsoe

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Posted 19 November 2006 - 08:56 PM

Check out the detail in how the slo mo cable connects.


Jae,

The same mount came with my D75mm f910 Selsi, to include the screw on slo mo cables just like yours. I would say it is the exact same mount except mine is fitted with a tube craddle for a 75mm diameter tube and it has a black krinkle painted finish rather than the gloss blue/gray of your Bushnell. I haven't used the 75mm f/12 Selsi tube on its original mount yet because I typically use it with my William Optics EZ-Touch alt/az mount, but now I'm curious as to its stabilty so, if I ever get a clear night again... something I'm beginning to wonder about, I'll set it up on the original mount to see how stable it is with the larger 75mm f/12 tube.

Don

#22 Jae

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Posted 19 November 2006 - 11:03 PM

JAE, my sector gear alt-az mounted 60mm Manon has the screw slow motion cable for the altitude axis. It's neat in appearance and more secure than the usual set screw method of attachment.

John


Hi John,

Nice, got a pic ?

Jae

#23 Jae

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Posted 19 November 2006 - 11:08 PM

[/quote] now I'm curious as to its stabilty so, if I ever get a clear night again... something I'm beginning to wonder about, I'll set it up on the original mount to see how stable it is with the larger 75mm f/12 tube.

Don [/quote]

Don,

I found a lot of little adjustments to tighten it up.....have to hit that balance between too tight and free to turn the slo-mo. Do you or maybe Steve have the same rotation in azimuth adjustment shown here ? Not sure how to tighten this, as mine rotates slowly. It seems to be a tight mount.

Jae

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#24 Jae

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Posted 19 November 2006 - 11:09 PM

Now it's cleaned up a bit.

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#25 Jae

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Posted 19 November 2006 - 11:16 PM

Here's a BOL on an Old Bushnell. I do not know what it means, but all BOL's I have seen are good quality. SYW's too. How about circle K? I sure wish we had a code map :confused:

Steve


Here's a circle K ! I was wondering who made this and no one knew....at least I know it's circle K whoever that is.
This lens is not as good as APL or Astro Opt, some spherical ab but it's much better after indexing (just a couple times) as others here advised me.

Jae

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