Hello everyone
I just bought a 12x10 Dallmeyer Rapid-Rectilinear. By it's serial number I can tell It is from 1883... So a good 140 years old.
It is in very good shape except it is really dirty inside. Ove the years the dust found it's way trough the waterhouse stop slit.
To clean it completely I'll have to unscrew the front and rear cells but the thing seems to be damn tight ! Do you have any tip to loosen it ? On "modern" lens I usually use some aceton or varnish nail remover to soften the threadlocker that is usualy used, but on this old lens I suspect the use of something different, maybe some kind of cement ?
Any hint welcome !
Thank you
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