I have a Mk16 DIN with R190 second. Reg was serviced in April. I paid for the kit as I knew I would be selling this. This reg was never registered. I have the original box and preferred parts replacement card and will provide details as to original purchase date and price so you can register it if you choose. This has only been used as a stage reg on my 40. It is O2 clean and has been used with up to 50% but only with O2 compatible air since last service. 1st and 2nd stages have some scratches consistent with normal usage that do not affect the reg performance in any way. Has approximately 15 dives since service. I am replacing all of my stage regs with HOG's. That is the only reason I am selling it. Comes with 32" hose. $200. Free shipping CONUS. Overseas & Canada actual shipping charges apply.