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mark cowan
Vendor (Obsidian Optics)
Reged: 06/03/05
Posts: 1369
Loc: salem, OR
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Re: Don't touch that flat!
07/03/08 12:38 AM
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Easily $1,000,000 or so. 
Really, it depends on the quality, and to a much lesser extent, the condition. It's the flatness that matters, not whether or not it has scratches from use. If its genuine 20th wave surface figure around $10K (anybody else?) unless you got it at a real fire-sale. They are very hard to make. HOWEVER, to be valuable to anybody else it has to be verified for accuracy.
As to what it's made of? If it looks like Pyrex it probably is. If it's clear like acid it's probably quartz or fused silica. If it's greenish it's probably plate, if it's yellowish or amber it's probably ZeroDur or similar.
I'm trying to find the original auction - ah I love the way they keep changing eBay to make it harder to do things - nope. Do you have the auction number, if it was an auction?
Best,
Mark
Edited by mark cowan (07/04/08 02:31 PM)
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26" thin mirror, anyone?
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Indianajones
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06/22/08 07:38 PM
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Re: 26" thin mirror, anyone?
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Stadius
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06/22/08 07:58 PM
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Re: 26" thin mirror, anyone?
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Indianajones
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06/22/08 08:00 PM
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Re: 26" thin mirror, anyone?
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helpwanted
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06/24/08 09:50 PM
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Re: 26" thin mirror, anyone?
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ken scharf
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06/24/08 10:26 PM
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Re: 26" thin mirror, anyone?
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greenglass
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06/24/08 10:39 PM
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Re: 26" thin mirror, anyone?
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Dick Parker
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06/24/08 11:38 PM
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Re: 26" thin mirror, anyone?
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HiggsBoson
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06/25/08 12:03 AM
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Re: 26" thin mirror, anyone?
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tatarjj
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06/25/08 11:29 AM
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Re: 26" thin mirror, anyone?
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sixela
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06/25/08 03:49 PM
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Re: 26" thin mirror, anyone?
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ken scharf
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06/27/08 11:41 AM
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Re: 26" thin mirror, anyone?
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Indianajones
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07/01/08 06:02 PM
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Don't touch that flat!
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mark cowan
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07/01/08 10:31 PM
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Re: Don't touch that flat!
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Indianajones
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07/02/08 08:22 PM
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Re: Don't touch that flat!
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mark cowan
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07/03/08 12:38 AM
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Re: Don't touch that flat!
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Indianajones
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07/03/08 06:44 PM
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Re: Don't touch that flat!
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mark cowan
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07/04/08 02:33 PM
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Re: 26" thin mirror, anyone?
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ken scharf
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06/25/08 12:18 PM
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