Dallmeyer 2B would you polish?

[Mark Sawyer]

A little Bondo and a coat of candy-apple red paint and it's as good as new!

[Chris7521]

Yes even if the glass was cleanable I don't see anyway of unscrewing it. not worth anything IMO.

I'm with you there. Look like it's off the Titanic 😂

[brandon13]

I am not even sure if someone said, "If you can clean this glass and get this lens back into useable condition, then you can have it." that I would take on the challenge. Looks like a nightmare of a project.

[EdSawyer]

for free I'd give it a try. The hood looks the worst, the rest could be salvaged somehow.

[goamules]

A toilet paper tube makes a handy lens barrel replacement.

[Jac@stafford.net]

Yes even if the glass was cleanable I don't see anyway of unscrewing it. not worth anything IMO.

PB Blaster! It will not hurt the glass.

[Steven Tribe]

It is obviously aluminum.

Correction! It used to be aluminium! There appear to be a couple of different alloys involved, but all rapidly becoming a collection of metal oxides etc. The knob has a dramatic corrosion fracture. Perhaps, the barrel parts are a better alloy?
Metal salts do damage glass surfaces too.

[franeq]

Really strange... on another listing there is camera with 2B in very good condidion for 645$. Repeat camera WITH 2B in good condidtion for 645$. I observe this listing for 3 months noone is interested... for this one eated lens 400$....

[anachromatic]

Correction! It used to be aluminium! There appear to be a couple of different alloys involved, but all rapidly becoming a collection of metal oxides etc. The knob has a dramatic corrosion fracture. Perhaps, the barrel parts are a better alloy?
Metal salts do damage glass surfaces too.

I think it could be an alloy known as zamak, like some early Heliars or Busch Nicola Perscheid.....

[Mark Sawyer]

I think it could be an alloy known as zamak, like some early Heliars or Busch Nicola Perscheid.....

It's possible, but it would have to be a pretty late 2B. Zamak was first made in 1929, and took a few years to reach Europe. Also, Zamak is known for its corrosion resistance...