Typical Golay pattern half-plate keyless going-barrel movement complete with finished keyless work and minute repeating train, the wheel train planted but not the escapement parts. The frame stamped 2 but no other markings that I can see. 43.5 mm diameter.
Charles Hector Golay, 46 Myddleton Square, London, Patent No 12417, October 1885. Swiss born (the Jura) but working most of his life in London, Golay was the main manufacturer, along with Nicole, Nielsen & Co, of the best English made complicated watch work at the latter part of the 19th century.
NB: This “interchangeable” minute repeating movement is exactly as shown in Golay’s trade catalogue of circa 1885.
In lovely original condition being still wrapped in the paper in which it has been stored since at least 1911. A rare survival and a document of past English manufacturing practice of some importance – more so than any finished example. Plus, being “interchangeable” they are an ideal and cheap source of spare parts – or can of course be finished.