Here are two nice power styles with the full F.M. Locke marking indicating they were the early production while Fred was still around. These seem less common than the ones with the F.M. blotted out. Actual postage additional

CD 296 - boldly embossed F.M. LOCKE VICTOR N.Y. // No 20, light aqua. VNM (tiny inner skirt flake) -- $15 (SOLD)

CD 287 -- F.M. LOCKE VICTOR N.Y. / PATD MAY 22 1894, VNM (small open bubble) -- $15