WW1 'Periscope Prism company' sniper scope???

[lmg15]

Fellow forum member Bindi2 has asked me to post pictures of his Aldis scope in here, along with the scope rings he has. I have already told him these scope rings are Evans scope rings. The focal adjustment of his Aldis scope is something I've never seen before, maybe someone else has?

PS: Rob, finally someone dared to say this! I'll however let others speak on it..

Edit: forgot to address this today:

This is GREAT information. IF PPCo also marked the SMLE overbore mount somewhere with their name, it would make it nearly impossible that PPCo also mounted the Aldis scopes to the "PPCo dovetail" mount and NOT put their name on it anywhere. The plot thickens.. And Roger, if you find any picture of this, please do share it. That would be great to see, thanks!

Promo, thanks for facilitating pics of Bindi's very interesting scope, and Bindi, nice scope! I have never seen this style of focal adjustment keeper plate before. You would think it would make adjustment in the field easier. The scope is set up for a mount with windage and looks like a post war re-graduation of the range drum to small bore use. Maybe the plate is part of Aldis's post war commercial offering? If so, then it implies that in post war Govt disposals to the trade, Aldis bought up scopes they previously supplied to the WO. If not, then could this have been an improvement that was fielded?

Regarding the PPCo dovetail mount on the Aldis scopes, you really do have to wonder why they are not marked accordingly if they were done by PPCo? I am not sure what I think at the moment as there are convincing factors either way. Also I am returning to one of my earlier notions that these rings were made comparatively late in the war for Aldis scopes. My original thoughts were that they were simply replacements for broken PPCo scopes that would allow the rifle itself to be re-used, especially if the rifles were selected for "1 in 3000 accuracy". However, I think that many of the scopes were set up on new rifles fitted with new factory matched scope ring/rifle mount sets. A very late made Aldis No.3 came to my attention that has matching number scope rings and rifle mount, and a higher scope serial number than most of the Aldis No.4 scopes I have encountered. None of it looked re-hashed in the slightest. All that said, I do believe that the timing of the order for the 750 lateral prism sets from Aldis will be key to knowing when production of this variant commenced.

Regarding surpmil's point about PPCo company ownership, I remain confused as anyone. Who were the shareholders? A bunch of private citizens or the Govt? Are they talking takeover of ownership or just management? If the Govt owned PPCo, when was the take-over? If Govt owned, then I can accept the idea that PPCo made dovetail mounts might have omitted the patent acknowledgement and company name if they wanted to. Maybe as a company in crisis under wartime pressures, details like this slipped between the cracks? On some of the 1918 /1919 overbore scopes they made efforts to mark the scopes, and on others, they do not. Curse your inconsistency PPCo!!