[LargeFormat] Compound Shutters

[LNphoto]

Well if DRP is roughly  "German Republic patent", What is DRGM?

Les

On Thursday, December 4, 2003, at 05:22  PM, Wilkes, Don MSER:EX wrote:

>
>>   Again, I don't have a starting date for D.R.P. but it was
>> used until sometime after 1945. D.B.P. was adopted at the
>> end of the war but was not immediately used so one finds
>> equipment made as late as 1950 or so still marked DRP or
>
> Oh, it means German Republic *Patent*, then!  That would explain why I
> couldn't find a reference to it either online or in one of the office
> Almanacs... I should have realized this, as last July, I had a short 
> note
> from Mr. Arne Croell on my old Carl Zeiss Jena 165 f/6.3 Tessar, which 
> I was
> trying to date.  It has an apparent serial number of 166752, and is 
> marked
> DRP 142293.  He said that he was travelling, and didn't have his list 
> of
> Zeiss numbers at hand.  However, he mentioned that list only starts in 
> 1927,
> at which point the serial #s were already past the million mark.
>
> So, it looks like DRP is pre-30s, at any rate.
>
> By the way, Mr. Croell had an article on VEB Carl Zeiss & Docter Optic
> lenses in the July/Aug 2003 issue of View Camera, which is what 
> prompted me
> to write to him. If Mr. Croell is listening -- could you possibly tell 
> me a
> bit more about my lens, especially its likely date of manufacture?  
> I've
> never found it mentioned in any references.
>
> Cheers!
> \donw
>
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