The original business location was destroyed by a fire many years ago but the business kept going mostly by word of mouth among it's customers, even though advertising ceased for a long time.
There is an Albert Jaegers Jr and an Albert Jaegers III and the company has a website - with an Adobe .pdf catlogue.
This is the e-mail address from their site:
Ajoptics@verizon.net
You might try writing.
There were some interesting anecotes posted on the Astomart website (if my memory is good) by someone who worked in the original factory. I tried a quick search of their forums but could not locate the postings. They were very amusing.