I just found an old post, this was what Yodap said.
"There are 3 versions.
V1: lume dots at 15, 30, 45, 60 - bad datefont - low beat movement = crap, stay away
V2: much better, refined dial, but can be still spotted at the blobby , uncentered lume, and the A173XX caseback
V3: Dial AR application is near perfect, caseback corrected, awesome AR and OR strap = THE WAY TO GO! "
I wonder if v3 = HBB maker's SOHC