Art. No. 0816 Basic information Manufacturer: Tissot Model: Visodate Winding: Mechanical, manual wind Lug to lug 41 mm Diametre excluding crown: 35 mm Height (highest point): 10,5 mm Strap width, Attach/Buckle: 18/16 mm Strap size, Long/Short: 115/75 mm Data Year (not validated by manufacturer): 1957 Serial no: 4141108 REF.no/Case no.: 57018-1 Jewels: 16 Looks and materials Strap material: Leather Strap color: Black Case type: Screw down case, 2 parts Case material: Stainless steel Crystal material: Acrylic Dial: Sand, silver Buckle material: Stainless steel Movement and meassurements (meassured in 6 positions) Caliber: CAL 27B-621 Average time deviation (sec / day): 3 Average amplitude (degrees): 277 Average beat error (ms): 2,0 Frequency (bph): 18000 Stated powerreserv*: 44 h Extended information Service, hands: Original hands** Service, case: Cleansed case in original state** Service dial: Dial in original state** Service, buckle: Buckle/Clasp not exchanged by Marcels Watch Group Service, crown: Original crown** Service, crystal: New crystal, Sternkreuz Service strap/bracelet: New strap from other manufacturer Service, movement: Miniservice Accessories Service documents: Yes Certificate of authenticity: No Box: No box Certificate: No certificate Grading and assessments Color grade dial: Top Wesselton Damage grade dial: VVSD Condition case: NP-Trace Overall impression: Grade A Warranty***: 12 months Remark: N/A Other *Deviation is to be anticipated **Originalpart mounted on the watch when purchased, no guarantee that it is factory original ***Function warranty, i.e. the functions is guaranteed to work during this time given that the watch is treated within the guidelines of treatment. In the event of outer mischief, warranty is not applicable See https://www.marcelswatch.com/en/vintage-guide/ for grading information See https://www.marcelswatch.com/en/vintage-guide/ for grading information Information from official webbsite: N/A