The RS-540SH with the black end bell only has the sticker on the can labelled "Mabuchi Motor RS540SH" and has nothing embossed on the can. The torque tuned motor has "RS-540SH-7525 BD107X07" embossed into the side of the can as well as the sticker labelled "Mabuchi RS-540 Torque Tuned Motor 54358" (25T).
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