The Premo Sr is an early plate camera produced by the Rochester Camera Manufacturing Company, a US maker active in the late 19th century before its absorption into the firm that became Eastman Kodak. As a folding plate camera of that era, it was positioned as a serious amateur or professional field instrument using glass plate negatives.

Sales data for the Premo Sr is thin: a single UK auction hammer result from July 2025 sells for £50, so the current market value sits around that level at saleroom level rather than at retail. With only one data point, the price a Premo Sr is worth today depends heavily on completeness, the presence of original plate holders, and the condition of the bellows and shutter.