Hall & Ruckel stamps are also known with X Bazin cancels for the reason revenuermd mentioned in the previous post. In 1878, they became the sole marketing agent for X. Bazin products and their private die stamps had the X Bazin cancel applied for use on these products. Interestingly enough, in the case of X. Bazin, a rectangle of ink hiding the H&R was also applied. I've seen it referred to as an overprint but I typically still call it a cancel. Maybe overprint is the correct term though since the intent wasn't to cancel the stamp but to indicate it's use on another manufacturers product?

It appears sometimes they obliterated the H&R but failed to add the XB indicating it may have been a 2 step process.
