See http://ubshwiki.ballarat.edu.au/index.php/Beckman_Instruments_Inc. Laminex covered timber box with handle, hinged top and front opening door. The box holds a pH Meter Model GS, with a number of dials and switches. the pH Meter measured the acidity or alkalinity of almost any solution, combining electronics and chemistry to create a product that was the first of its kind.(http://www.fundinguniverse.com/company-histories/beckman-instruments-inc-hist ) On the inside cover of the box is a printed page of instructions for use.ballarat college of advanced education, beckman, beckman instruments inc, ph, ph meter, scientific instruments, california, america