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1st surface mirror.
Some time ago i purchased two f.s.m. from a chap in Canada.
They measured 9.5''x4.5''x1/2'' sealed in packages marked for the US military.
They are described as ''Periscope FSCM'' followed by by various numerals.
The seller said they were for submarines but I've since come to believe they are Tank periscope mirror's.
According to him they came from SURPLUS SHED. I really don't know if they are still available but it could be worth contacting them.
My intention was to do what you are planning,just haven't got around to it,but with the little bit of testing with temporary setups they appear to be top quality. From memory i think i paid $25us each + shipping,in the parity day's.
Could be worth a try.
Frank.
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