A couple of sights have turned up in our workshop area at Duxford. The first, a "Sight, Dial No 10 Mk II speaks for itself, but we'd appreciate any info on what gun it might have been fitted to. Here's a pic: The other one is a puzzler: It carries no markings, save for some scratched numbers on the mounting face: And as the possible diopter numbers (?) are shown like so: Perhaps it is mounted with the brass ring to the bottom? It's certainly missing the eyepiece. It also has a small glass "window" with a red filter, suggesting that an internal graticule may be illuminated. Any ideas on what this might be?