Merson was a distribution company founded by Bernie Mersky in the 1940s in New York. Merson archtop electric guitars and amplifiers first went on sale in the late 1940s under the Tempo brand name. By the late 1950s and early 1960s Merson was distributing Giannini acoustic guitars from Brazil and Hagstrom electric guitars from Sweden. Around 1967 the Unicord company was merged with Merson. Merson moved from New York City to Westbury, New York and became Merson Musical Products, A Division of Unicord Incorporated.

Source: Univox et al Merson/Unicord. Michael Wright. Vintage Guitar Magazine (26 April 2018)