細節
An unusual early 20th-Century molecular modelling kit,
with ivorine plaque on the lid reading MOLECULAR MODELS MANUFACTURED BY CATALIN LTD WALTHAM ABBEY ESSEX, containing various coloured molecular components made from catalin, rubber pegs and a pair of pliers, in a labeled and compartmentalised felt-lined and leatherette-covered case -- 50cm. (19¾in.)