Watch List notes:

The Portland Collection, Commemorative Medals, Engineering: 'Scientific and Philosophical Medals' (2), c. 1830, by Sir Edward Thomason, from the set of 16, white metal, Hydrostatics/Hydraulics and Pneumatics, Savery's Steam Engine/Trevethic's High Pressure Engine, 73mm. (BHM.1336, 4 & 13; Eimer 1237), bright extremely fine (2)
bt. A. H. Baldwin.