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I believe what you have is a c1950s reproduction, styled after the work of Duncan Phyfe. Phyfe was one of the leading American cabinetmakers in the first half of the 19th Century, producing his own interpretations of fashionable 18th/19th Century European furniture. His designs were widely copied in a revival of the styles in the 1940s and 1950s.
The impressed marks on your buffet are typical of those used by the Drexel Furniture Company of North Carolina. The ‘MAHY’ mark is shorthand for ‘Mahogany’ (finish). Drexel was founded in 1903, originally producing only in American oak but by the 1940s (and especially from 1957 when they acquired the Morganton Furniture Company) they were producing huge quantities of living room, dining room and bedroom furniture… much of it in mahogany finish heritage styles.
The 1957 catalogue has 1,200 offerings, supplied to 2,500 retailers throughout the country. With a bit of Googling you will likely be able to track the style number '1630'.