Last week I scored a 1970's sound monitoring meter from work along with various calibration fittings. They are all high quality, leather cased instruments from the days when scientific equipment was very expensive and built by guys in lab coats.

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At the best "conquest" site I've ever been at (a story in itself) we found a two-pan analytical balance that must have been from the early 1900s. I believe it has a Fisher plaque on it which would be possible since Fisher Scientific was founded in 1902. The balance itself was brass and the enclosure was wood. Just checked ebay and it was much nicer than anything currently listed. My boss kept it for his office.