1953 Topps - Checklisting the 'Pedantic Master Set'

[G1911]

Okay, there are a ton of different small Sandlock variations. Going shopping for the defect, red stripe in lower left, there's a lot more.

The card was evidently printed next to a red card on the left and a red card beneath it (not a black box, as most of the sheets must have done). There can also be a small black stripe extending a little bit outside of the black box in the lower left border.

That's 4 points of differentiation, that exist in many combos. A) the white defect in upper left, B) the red line from being off-center in lower left, C) the red line at bottom from being off-center, and D) the black line in lower left extending upwards from name box

Attached are scans of cards with the upper left defect. First has the red stripe at bottom left, second has the red stripe at bottom left AND on the bottom.