Seiko Project: "Deep Blue" - Part Two - How to Replace Your SKX Chapter Ring, Crystal & Bezel Insert - YouTube
Modded a Turtle Chapter ring to fit in a Heimdallr SKX007 case (that uses regular SKX007 chapter rings) Risky... but looks like it was worth it! : r/SeikoMods
Black GMT Chapter Ring - Watch-Modz
CT204 – Chapter Ring – SKX007 SRPD Case Type – Stealth - seikomods.com
Modding the New Seiko 5 Sports GMT Watch | Feldmar
Navy Blue Chapter Ring for Seiko SKX007 and SKX009 fits 7S26-0020 MOD Part | eBay
Chapter Ring SKX007 PLGS Style / Date Frame / Black – TOKEILAB.COM SEIKO MOD PARTS - USA Based online Store
Chapter Ring SKX007 SKX Style / Grey + White – TOKEILAB.COM SEIKO MOD PARTS - USA Based online Store