Brass, 38.8mm diameter.  1811 A CALENDAR Sunday Figures above square table with numbers, maker's name P, KEMPSON & SON. BIRM  in lower right corner.  R.  Eclipses, NEW MOON, FULL MOON etc.  Lines have been excised around the tables both sides, perhaps to make them clearer, and a few dates highlighted by circles and other marks.  Good - fair.

See Silke Ackerman, 'Calendar Medals in the British Museum', The Medal, no. 45, Autumn 2004. The examples in the British Museum are named P. Kempson dated 1797 - 1798, after this the name changes to KEMPSON & KINDON 1803-1809.  This type is not in the BM.

The name Kempson & Son was in use 1810-24.