Here's my entry into the tribute group build. This is the 1:1 scale, Tail Boom, Bar & Stroud gun sight (early version) as used in the BoB Spitfires, Hurricanes etc. In fact it was fitted till 1941 when it was replaced with an upgraded version. The later version had a rectangular sight glass.
First 2 photos show the parts minus clear the lenses. The 3rd shows the crash pad. When this was removed from the casting block some of the texturing was lost and also 4 pin holes appeared. I used milliput to cover the whole side and then blended the edges in with a wet finger. I then used the same method to regain some texture. The last 3 photos show just the head section parts. The crash pad is held in place with a drill bit and the sight lens is only placed in it's slot for the photos.