10 foot standard (Cape of Good Hope Survey), 1840 10 foot standard (Cape of Good Hope Survey), 1840 1840
Marconi frequency standard type RD 101B, c. 1963 Marconi frequency standard type RD 101B, c. 1963 1963
Parliamentary 5ft Standard, brass, by "Troughton" 1796, in mahogany box. Bar 5ftx1 7/16" x7/16". Divided in inches and tenths and figured from 0 to 60, at division 46:- 17" 58. Engraved Troughton London 1796. "Parliamentary Standard" various divisions on back "Exch" standard of Hen VII. 1490, "Exch" standard Eliz 1588, "Yard" "Ell" Parliamentary 5ft Standard 1796