Collection

Scientific & Curious

Instruments, astronomical and optical apparatus, and objects that resist classification.

Seventeenth-century planispheric astrolabe in brass and steel.
Representative collection image · The Metropolitan Museum of Art / Wikimedia Commons · CC0

How we catalogue it

Instruments are assessed for completeness, originality of finish and whether they still function. The department also holds the objects that belong to no obvious department, which are often the most interesting things in the catalogue.

Instruments · Optical · Uncommon

Currently catalogued01

Where an entry has not yet been photographed its plate is shown blank. Featherstone Vaults photography replaces them entry by entry; no stand-in imagery is used.

Buying in this department

What we look for

Completeness, originality of finish, and whether the instrument still does what it was made to do. A telescope without its eyepieces, a microscope without its case and accessories, or a theodolite missing its tripod is a partial object and is described as one.

Lacquer is the usual point of damage. Brass instruments were lacquered when made, and a great many have been stripped and re-lacquered or polished bright. Original lacquer, even dulled and patchy, is worth more than a renewed finish, and we say which an instrument has.

Makers and marks

Signatures, retailers' marks and serial numbers are recorded and photographed. A retailer's name is not a maker's name and we do not conflate the two.

Where an instrument can be dated from its maker's working dates or from a serial sequence, we give the basis for the date rather than just the date.

Worth asking

Is it complete with its case and accessories. Is the lacquer original. Does it function. Is the signature a maker or a retailer. What is the date based on.

Further reading