Brand: SEIKOMATIC SELF DATER WATER 30 PROOF DIASHOCK
SM171 (18/07/21 2130)
Function: Hour, min & sec hands with date
Caliber: 395 / 34xxxx
Vibrations per hour: 18,000
Driving system: Automatic winding with hacking (Stop the sec hands)
Dial: Nice silver color dial original (Some very fine stain)
Dial no: JAPAN MASKJ13H370-AD
Crystal: Acrylic (Some fine scratches)
Case: Stainless steel (Fine scratches & very small dent)
Case back: Stainless steel (Fine scratches)
Dimensions of case: 36.5 x 44.5 mm (Excluding crown)
Case lug width: 18mm
Band: Hand made leather strap
Condition: Used, working, very fine in as found condition as you can see at the Picture
Service: Yes
Power reserve: Fully wind or charged will last up to 35 to 40 hour's depend on movement
Accuracy: Tested flat & it's within 60 sec. Please see the last pic
Quick set: Yes, Do not quick set the date with 10 to 4 o'clock
Pull out the crown to the first click to set date & pull out the crown to secound click to set time (Set the time to 5.30 or 6.30 than quick set the day or date will be better)
Remarks: This watch are used in Japan