London, U.S.A. Philip Wilson Pub Ltd / Zwemmer 1995. First Edition. xviii, 331 pages. Original maroon paper covered boards. Dust jacket with minor wear and rubbing. Corners bumped. Spine and rear dust jacket panel sun faded. Some creasing and rubbing to the dust jacket. Clean and bright internally. Very good / Very Good. Boards. 
An essential reference for collectors, dealers, or institutions interested in scientific instruments from this period. Each maker entry identifies different addresses and when the manufacturer operated there, related firms that both preceded and followed each firm, and the types of items made where known, etc. Many primary sources are cited as well. An impressive piece of scholarship, and one we use regularly.