WW1 'Periscope Prism company' sniper scope???

[Roger Payne]

Kind fellow forummer Valley Sniper just happened to have a PPCo in bits to hand & has confirmed that the focus screw is 5 BA, the capstan screws are 4 BA, & the objective housing screws are indeed 8 BA. These are all readily available from model engineering suppliers, as are the taps & dies. If you have any problems in sourcing them Gripster then let me know...

Valley Sniper was also the person to whom I was referring when I mentioned that a friend had a better example of the early 'wrap around' range drum saddle variant, & he has sent me some photo's of his example, which I will upload shortly......all being well!

Addendum - here they are. The OG lens is mounted differently to the later PPCo's - it sits in a concentric housing similar to binocular OG's).