In your article on the telescopes, you mentioned some of the work done refurbishing them in the late seventies. Could you have a look at this pic and tell me if the outer covering is the "rexineicon" you refered to, and also, have the tubes been re-finished?

One train of thought is the tubes must be original as the engraving would not have been gone over again to remove the black from them.

TIA,
Brad.
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