You're buying the blade cap shown in the photos. 

I'm not sure of the manufacturer of this cap, however the cap was test fit on a Stanley #130 block plane, and worked without issue.

This cap has a casting number 1146 on the back side. 

This cap appears quite similar to the later versions of the Stanley 110 and 130 caps.

The cap measures slightly over 1-1/2" in width.

The cap is in good working condition with a good deal of japaning missing on the palm rest.