I have started this thread again as I have discovered a 3B, with a missing final rear element, but in a rear-turn barrel and complete front achromat.
Commercial organisation in London. Price would be cheaper than getting this achromat made. Alternatively, you could sell them the ajustable rear lens?
I have sent a PM.


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Thank you very much Steven for all your help and remembering about my 'mission impossible'!

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