Switzerland, Geneva, 1801-1855. Isaac Henri Metert was possibly in business as early as 1836 making musical boxes and produced boxes during the period 1844 to 1852 with David Langdorff as Metert and Langdorff. The partnership won an award at the 1851 Great Exhibition held in London, England. Considered a high quality maker. Year of manufacture usually scratched into left cylinder cap along with the serial number (e.g. 2/48 – February, 1848).