Brass Calibre Duplex by Barwise

An early 19^th Century English duplex by Barwise in a gilt metal consular case.  Full plate gilt keywind fusee brass calibre movement.  Plain cock with diamond endstone, polished steel regulator the index pins acting through a slot in the table.  Plain four arm gilt balance with blue steel spiral hairspring.  Duplex escapement, large brass escape wheel, pivots with endstones. Numbered white enamel dial with subsidiary seconds, Roman numerals, blue steel seconds hand, gilt hands. Plain gilt metal consular case, the bezel and back sharing the same hinge, maker's mark "AG" over "JM" and number corresponding to that on the movement.