Vintage Seiko Stopwatch produced by the Dani-Seikosha factory (King Seiko). Reference 88-5021. Overall, this stopwatch is in B, good condition. This stopwatch features the Seiko Cal. 88 movement that beats 36,000 times per hour (ten times a second). The second hand indicator makes two full revolutions per minute and can time to the tens decimal point. The minute track can time up to 15 minutes. 

- Ref No. : 88-5021
- Serial No./Year: 551548-/-1975
- Case:
    48mm diameter
- Crystal: Acrylic
- Movement & Accuracy: 
    Caliber: Dani-Seikosha Cal. 8800D Manual Wind
    Complications: Stopwatch (Seconds, Minutes)
    Measured Accuracy: +12 sec/day.
    Amplitude: 151°
    Beat Rate: 36000 A/h
- Band: Rope Lanyard
- Condition Rank: (B) Good Condition. Please See Photos and Condition Rank Guide
- Country of Manufacture: Japan

Condition Rank Guide:
-NOS: Item is in New Old Stock condition (NOS). Shows little to no signs of wear apart from some minor handling wear.
-A+: Item is in Excellent condition. Micro-scratches can be seen on the sides of the case, bezel, and/or bracelet. No pitting/gouges on the case or scratches in the crystal.
-A: Item is in Very Good condition. Minor scratches and scuffs can be seen on the sides of the case, bezel, and/or bracelet. No pitting/gouges on the case or deep scratches on the crystal.
-B: Item is in Good condition. Moderate scratches and scuffs can be seen on the sides of the case, bezel, and/or bracelet. Minor pitting/gouges may be visible on the case. One or less deep scratches may be visible on the crystal. See photos.
-C: Item is in Fair condition. Heavy scratches and scuffs can be seen on sides of the case, bezel, and bracelet. Significant pitting or gouges are visible on the sides of the case and the crystal shows multiple deep scratches
-NR: Item is in Non-Running condition. Item is not functional. For parts or repair only.