This is a homage to the vintage 3646 Radiomir type. The original 3646 currently costs nearly 20 million yen (around 5 million yen around 2005). This is not a Chinese Marina Militare homage brand like Parnis, nor is it from Ebisu Repair Workshop or RXW, but it seems to be a custom piece with details like a brevet crown for the lug fixation. I haven't seen these around much lately. No logo, no markings on the body. Screw-down brevet crown. The lugs are fixed to the body and cannot be removed, but there is a spring bar in the middle, making it easy to change the band. Lug width: 26mm Case size: 45mm Movement: Seagull ST3600 Only tried on indoors. I have a main watch, so I don't think I'll use this much, so I'll pass it on to someone who will.