Nineteenth Office Letter Scale.

Small scales of the Roberval type used to weigh mail or, more precisely, to define the postage bracket applicable to mail. The left tray, smaller and circular, is intended to receive the masses marked with the characteristic shape "bucket weights" while the right tray receives the letter. Signed NB for Narcisse Briais, French builder of the second half of the 19th century. At rest, the masses are housed in the wooden base. Good condition, with traces of use. Length 20 cm, width 12 cm, height 11 cm.

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