Chapter ring : 30
Luminous GMT Ceramic Sloped Bezel Insert for SKX/SRPD - Sprite
Case back : 316L stainless steel solid case back
Seiko (SII) NH34A Automatic Movement (White)
T018670 (BY0080-57E
Box Mineral Crystal for Seiko 6139 Series (Blue AR Coating) Crowns Chapter ring : 30Box Mineral Crystal for Seiko 6139 Series (Blue AR Coating) Suitable for: Seiko 6139 Series (Full list below) Dimensions : 33mm x 1. 5mm This Mineral Crystal is compatible with: Seiko 6139 Series : 6139 6000, 6139 6001, 6139 6002, 6139 6005, 6139 6007, 6139 6009, 6139 6010, 6139 6011, 6139 6012, 6139 6013, 6139 6015, 6139 6017, 6139 6019, 6139 6030, 6139 6031, 6139 6032, 6139 6040, 6139 6041 For more information on type of crystals & reference table