DALLMEYER 50mm f/3.5 LENS (Ex-WWII G.45 Gun Camera) No Iris
s/n: 280608
According to The Lens Vade Mecum, (Glanfield / Wright) available online at:
http://lens-club.ru/public/files/pdfs/964e6590b548c96dfc4fc829e3a02266.PDF
...the lens used in the G.45 (search for 'G45') was a Dallmeyer 50mm f/3.5.
This is a set focus (no focusing mount), no iris lens.
This example will require some cleaning before it performs at its best but here is true history combining the fabulous lens ** of Dallmeyer with the fact that this may have been used in the legendary Spitfire fighting aircraft of the 2nd world war.
https://**.ebay.com.hk/itm/DALLM ... 2057872.m2749.l2649