Letter balance by G. Riddle, London, Registred Design No. 113 of 1839. All brass, with silvered quadrant. Graduated 0 to 4 oz by 1/4 oz. 7,6" tall. The version with engraved floral designs all over, is very hard to find.  

Letter balance by G. Riddle, London, Registred Design No. 113 of 1839. All brass, with silvered quadrant. Graduated 0 to 4 oz by 1/4 oz. name, date and Reg. No. on the weight. 7,6" tall.