Thanks I guess. My last interesting find was an Opticron "Gallery Scope", an 8x20 monocular that focuses from infinity to 30cm. They're quite distinctive looking so I spotted it straight away while scrolling through the CashGenerators website.
They're not rare as such but I've never seen a used one before and there's very little about them on the interweb. This was an older version, leather case, metal construction, made in Japan.
The punchline: "£4.99 (£2.50 pp) in vgc" lol. A new one has the rrp of £120! It doesn't happen often but... Idiot sells to moron while his boss plays on his phone. >>3546236
I'll try to take some photos but the "submarine" lens is quite boring to look at really. Just a brass housing. The lens itself because of the extreme focal length and f ratio looks like a piece of thick glass.
I like reticules a lot. A good example I had got stolen/pinched. Huge brass thing from an artillery/tank gun. With an LED where the bulb would be the fine sighting marks would illuminate.
Photos of the Schneider Kreuznach repro/copy lens I got for free might be more interesting :)