11.5 ligne in size (26mm) by 5.67mm thick, hand Replica Omega watches sizes are 100/165/17. 21,600 vph, 45 hour power reserve, Parashock jewel protection.It's available from Otto Frei for $31 in single-piece quantities.The spec sheet (PDF) from Miyota is available here.Timekeeping As noted, the movement is rated to -20/+40, and most Holotype reviews claim it does considerably better than that.
After wearing it continuously for a couple of weeks, mine seems to be running fast, but I need to actually measure it to be sure.I'm also Replica Tag Heuer watches working on a watch timer to measure performance, so I'll update this section when I have data.DiscussionI suspect that the choice of the 8215 is one of the keys to the Holotype affordable.It's not as prestigious or as accurate as, say, an ETA 2824-2, but it's bulletproof, built to run for decades with no maintenance, easy to repair and very widely used.Another testament to the design is from China, where Sea-Gull used the 8200 series as the base for their successful line of movements.
(Though they upgraded the winding to Replica Bell&Ross watches bidirectional by copying the Seiko Magic Lever system.Interestingly, the Miyota PDF claims that the unidirectional winding is more efficient given the energy distribution from wrist movements.) This review of another dive watch says that the Miyota 821A is "the new, nicely decorated version of the very dependable 8215" though I've not found any corroboration of this elsewhere.
