A mid-19th Century presentation roller-rule by Elliot & Sons
the ebony rule with ivory scales on each edge with brass roller along center, each end with calibrated ivory drum, the wood engraved Ewan Christian to Charles Henry Purday June 27 1851 In all labour there is profit Prov XIV-93, the reverse signed Elliot & Sons 56 Strand London, contained within a fitted plush-lined leather covered case with brass securing hooks -- 12.10/16in. (32.7cm.) long
See illustration