Mckee & Mason 90 & Also Listed As A Thomas Handbook 21A Lemat Revolver BulletFor your consideration one McKee & Mason 90 & also listed as a Thomas handbook 21A LeMat revolver bullet. You will find this bullet to be in excellent dug condition. The patina is a white to brown color & about as nice as you can find. Inside of the wide groove a knife mark can be seen where the paper cartridge was arsenal trimmed. The solid base is smooth. Measures about 0. 405 x 0. 61 inches.