01-071. LEITZ DOUBLE DEMONSTRATION MICROSCOPE EYEPIECE
01-519. WENHAM BINOCULAR "CHALLENGE" POLARIZING MICROSCOPE BY J. SWIFT & SON
01-520. LEITZ ORTHOLUX-POL UNIVERSAL RESEARCH MICROSCOPE FOR INCIDENT LIGHT
07-060. EARLY G. HERBERT SMITH-TYPE GEM REFRACTOMETER BY J.H. STEWARD
07-054. POCKET GEM REFRACTOMETER BY GEM INSTRUMENTS
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07-055. EARLY WALKER'S SPECIFIC GRAVITY BALANCE FOR ROCKS BY BAIRD & TATLOCK
07-057. NORREMBERG MINERALOGICAL POLARISCOPE BY STEEG & REUTER
07-058. 15-PIECE SET OF GLASS HISTORICAL DIAMOND MODELS
07-059. 19 (of 24) PIECE SET OF COLORED GLASS GEMSTONE CRYSTAL MODELS BY KRANTZ
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