The Seiko Bell-Matic 4006-7002 is one of Seiko’s most charming everyday complications – a compact 33mm automatic with an integrated mechanical alarm. This example pairs a dark sunburst dial with a chunky late-60s case shape, giving you a classic Bell-Matic look on a comfortable modern leather strap.
| Brand | Seiko |
| Line | Bell-Matic |
| Reference | 4006-7002 |
| Condition | Vintage, good overall with patina on the dial and noticeable wear on case and crystal consistent with age. |
| Dial | Dark sunburst dial with applied baton indices, luminous-filled hands, printed minute track and day-date window at 3 o’clock. |
| Case Material | Stainless steel |
| Case Size | Approx. 33 mm (excluding crown) |
| Case Back | Stainless-steel screw-down case back, signed Seiko with reference and water-resistance markings. |
| Movement | Seiko automatic calibre 4006, 17 jewels, mechanical alarm. |
| Crystal | Acrylic (with surface marks from use). |
| Water Resistance | Originally marked water resistant; not pressure-tested, sold as not water-resistant. |
| Function | Hours, minutes, central seconds, day-date, mechanical alarm with inner rotating alarm ring. |
| Strap | Aftermarket black leather strap with white stitching and pin buckle. |
| Country of Origin | Japan |