This Blancpain Fifty Fathoms reference 5010A-1130-NABA marks the line's 70th anniversary in a configuration limited to 70 pieces. That alone gives this steel variant a different place in the modern Fifty Fathoms run, and for a collector of the model it is the commemorative issue to set aside. Its automatic movement keeps the mechanics straightforward, with the date left in the background rather than asked to define the watch. In stainless steel, the case measures 42.3mm across and 14.3mm thick, a size that preserves the Fifty Fathoms' established stance on the wrist. The black dial stays true to the stark, functional look that made the model's reputation. With 300 meters of water resistance, this is still a proper diving watch rather than a purely anniversary exercise. It stands as a concise modern statement of Blancpain's foundational design, made scarce by a tightly held production run.