Fully Original 1968 Seiko 37mm Men。Item Description Hello! Thank you for taking the time to view my listing. For sale here is an excellent watch, all the information you need in regards to the watch is listed below. If you have additional question, please feel to reach out. For my repeat customers, you may notice that my description looks a little bit different. I have modified the formatting to make it more simple and concise for my customers. Brand: Seiko Model: Sealion M55 Reference/ model number: 6105-8090 Band reference: N/A Serial number: 831816 Circa: March of 1968 Movement: Japan made automatic, 6105A non-hacking variation of this movement Service/ battery: Last service is unknown, but was has been inspected and it does not need a service at this time (will eventually need one though) Functionality: Tested and keeping time, all functions working flawlessly Case size: 37mm stainless steel Lug/ band size: Watch has an aftermarket 19mm nylon strap installed on it Features: Black dial, smooth fixed bezel, Japan made automatic movement, \"waterproof\", acrylic crystal, and date indicator Box/ papers: Not included Condition I use the following scale to rate my watches. The scale goes from 1-10-N, from lowest rating to highest new rating (1-2 is poor, 3-4 is more than average use, 5-6 is average use, 7-8 is lightly used, 9 is like new, 10 is refurbished, and N is brand new). I rate a number of features on each watch which are listed below. Any noteworthy issues or concerns will also be listed