BBT Krauss 7x50
Mfr: BBT Krauss, France
Date: circa 1960
AFOV: ~50 degrees
TFOV: ~7 degrees
Eye Relief: ~15mm
Prisms: low index
Serial Number: 144531
This BBT Krauss 7x50 appears to be a military design, with individual focus and an unusual damping linkage between the eyepieces. The eyepieces appear to have rubber eyecups that have worn away in this sample. A date from 1963 is hand marked inside these binoculars, which I believe is when they were serviced.
Optically, these have a sharp, well corrected image but with the narrow field typical of most 7x50's. The exit pupils are slightly squared off and there is some slight leakage visible from the prisms. The coatings appear to be of good quality, with a bluish-purple tinge.