| Art.no | 0657 |
| Manufacturer: | Sjöö Sandström |
| Model: | Serie 1 |
| Winding: | Mechanical, automatic |
| Diametre excluding crown: | 37 mm |
| Height (highest point): | 1993 |
| Year (not validated by manufacturer): | N/A |
| Movement number: | 536 |
| REF.no/Case no.: | N/A |
| Jewels: | 25 |
| Strap material: | Black, leather |
| Strap color: | HIRSCH |
| Case type: | Sjöö Sandström, no sign |
| Case material: | Stainless steel |
| Crystal material: | Beg., Sjöö Sandström |
| Dial: | White |
| Buckle material: | HIRSCH, stainless steel |
| Caliber: | ETA 2824-2 |
| Time deviation: | +20s/d |
| Amplitude: | 251 |
| Frequence | 28800 |
| Stated powerreserv*: | 40 |
| Service, hands: | Original hands** |
| Service, case: | N/A |
| Service dial: | N/A |
| Service, buckle: | New original Hirsch buckle |
| Service, crown: | Original crown** |
| Service, crystal: | Original crystal** |
| Service strap/bracelet: | Nytt Hirsch Duke |
| Service, movement: | Miniservice |
| Service documents: | Yes, in English |
| Written estimate: | No |
| Box: | 0 |
| Certificate: | Marcels piano gloss, Marcels certificate |
| Color grade dial: | Riverside |
| Damage grade dial: | Flawless |
| Condition case: | Opolerad, lite till normalt slitage |
| Overall impression: | Grade AA |
| Warranty***: | 12 months |
| Remark: | Tight manual wind due to stiff mainspring, originalbox in wood missing inner part and metal plate |
| *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 | |
