This is an extremely rare find probably NOS condition. The adhesive paper is still on the back case!! A wonderful and modern (made around 1970!) Tissot Sideral automatic, with fiberglass case, silver dial, grey fiberglass case, from my personal collection. Tissot Signed crown, and Tissot signed strap. Watch is full original. The watch is perfect ! I can not find any flaws looking at it. Service History: Unknown. It runs good, winds good and keeps time. Case size: 40mm without crown. Caliber number: 784 probably... Excuse me but I don't have the tools to open the case. Case reference: No tools to open. Price: 200 EUR plus postage and PayPal fees (around 220 total!). I will ship to EU and USA. References: Unfortunately I have not made any sales through OF at the moment. However I have sold many watches through WUS, Ebay, Instagram, Facebook marketplace. Please ask me for them if you wish.. -Feel Free to PM me if you have questions