This is Bauer's single-sided band: codes 501 through 750, cut along one edge of the blade only. Codes 701-750 also exist on Bauer's double-sided key, and the two do not open each other's locks — so the shape of your old key matters as much as the number.
250 codes · Priced by phone · cut on a ESP Y13 blank
Single-sided: one edge of the blade is cut, the other is smooth. If both edges of your old key are cut and the code is 701-760, you need the double-sided key instead.
Read the code wrong? These are the neighbouring bands.
Send us a photo of the lock and we will tell you which key you need. No code, no guesswork, no charge for asking.