Cooke WA Anastigmat 158mm VII B F/6.5

[fuegocito]

Recently I got a hold of this little lens, mostly out of curiosity of how it compares to the Wollensak 159mm WA. It being in a fairly modern Copal 1 shutter is kinda interesting too. The rear element is a bit loose in its housing, so upon opening it up, it reveals that the rear element's two glasses are mounted separately, one is in-mounted, and the other one sits loosely(somewhat) in the rear hubcap. My guess that this is not factory original but it doesn't look DIY either. Just wondering if anyone else have anything like it.

I haven't shot with it yet but the image projected on the ground glass looks normal.

here are a few quick pixs of it