For your consideration one mold variant - other - of a Thomas RBRF4 bullets 63, 64 & 65 54 gauge revolver, Kerr bullet. You will find this bullet to be in excellent dug condition. The patina is a slick, smooth, white color & I do not see a single patina chip. As to the mold variant-notice the elongated base sprue (pedestal) this bullet sits on. I don't see this exact bullet type listed. In between the two grooves a faint knife cut mark can be seen as if the paper cartridge was trimmed with a pocket knife. Measures about 0.45 x 0.74 inches.
Also see McKee & Mason bullet 121 & Thomas handbook 45A.
See all 4 photos.