The Monroe No.1 is an early plate camera produced by Monroe Cameraco., a late-19th-century American manufacturer. It belongs to the wood-and-leather folding camera class typical of the period when the model was first offered.

Sales data for the Monroe No.1 is extremely thin: the only recorded UK auction hammer result is £92 from a Christie's sale in 1998, which gives a single reference point rather than a true market range. With no recent comparable sales, today's value is difficult to pin down, and what a Monroe No.1 is worth in 2026 will depend heavily on condition, completeness and bidder interest on the day it sells.