Edwardian Set of Avoir Standard Weights for The City of Liverpool by W&T Avery Dollond Patent controversy One of these patents he

One of these patents he was engaged in perfecting at the time of his death

A long brass pointer transfers the movement of the hair up to a central silvered scale plate measuring 30 to 100 degrees of humidity

mahogany handle and a threaded loop into which three different telescope options can be fitted for use

Advertising during the period provides a slightly ambiguous suggestion to their historic links:

Charles Hyatt-Wolf proposed changes to the process which would include examination and certification and having received his re-buff

Edwardian Set of Avoir Standard Weights for The City of Liverpool by W&T Avery Dollond Patent controversy One of these patents heFor sale, an Edwardian set of Avoir Imperial Standard Weights for The City of Liverpool by W&T Avery. The set includes all county standard Avoir Weights with 50lb, 20lb, 10lb & 5lb all clearly engraved to the top face and with the Avoir unit of measurement engraved below. Each weight has the manufacturer's name of W&T Avery Ltd, Birmingham to one side, with the other reserved for the indenture mark of 990 and City of Liverpool for whom they were made.