Here's two dustcovers pictured below. One is a cast alloy, just wondering what else went on it for mounting a scope?

The other one has had an interesting mod. The bracket soldiered onto the top has what looks to be a 1:1 scope on it. The bracket is screw adjustable for elevation, and has some increments marked on the adjustment nut. The "scope"...(I think it would be better termed as a lensed aperture tunnel) has the following marks...
"CR1031"
then it has a large "W" with a smaller "W" inside it
next "Reg. No"
"WWL1188"

anyone got any clues?
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