Large hollow-back fullplate fusee frame, with barrel-bar covering the main and smaller alarm barrel. No train, fusee or escapement. 49 mm diameter.
English rough movements with complications are rare survivors, this being the only example of its kind I have ever seen. No identifying stamps or numbers but it certainly dates from the period when Viner and others in both London and Liverpool were selling the patent alarm watches of Joseph Anthony Berollas; his PATENT No 3342, May 1810.
Dull, rather dirty and some of the exposed steelwork rusted from having survived in workshop conditions for most of its life (200 years), but still a fine and rare record of just how good was the work of this part of the English, mostly Lancashire and Coventry, trade.