Most things in human culture are cyclical, especially regarding style and watches.
A prevailing trend in 2025 has been the rise of smaller case sizes, on par with those of the 1950s through the early 1970s. Dress watches have led the way, but field and dive watches are catching up.
Marathon has met the changing, or rather, the regressing, times by releasing the OSAR-D (Original Search and Rescue – Date) dive watch in a 36mm case size. It is available with the original black dial and the Arctic dial released earlier this year.
While the Canadian watchmaker has produced plenty of 36mm watches before, the OSAR-D makes the most sense in that size. Even though it was introduced in the early 2000s, it is modeled after classic dive watches from the late 1950s and early 1960s, when most cases measured less than 40mm.
The alternating geometric indices, obelisk hands and dash minutes track are reminiscent of vintage Seiko and Rolex designs.
From a pricing standpoint, Marathon lands closer to the former than the latter. The Canadian watchmaker makes some of the most robust dive watches available in the $2,000 range, and the OSAR-D retains its 300m water resistance in the compact 36mm package.