2 Pack of Hermle, Hamilton, Ridgeway, Howard Miller, Seth Thomas, Clock Winding Key #7/4.00 This is a German made unused Hermle Trademark clock key This key is for mantle or wall clocks that have hermle series 141,150, 151, 340, 341, 350, 351, 1050, 1051 movements in them Convienent 2-Pack so you can use one and put the other away for safe keeping. Both keys are the same size.