Overview:
Vintage Hamilton Chrono‑Matic Cal.11 automatic chronograph (Ref. 11002-3) with blue dial, tachymeter scale and date at 6. This is a wearable-vintage piece that runs but requires repair: the chronograph will start but quickly gets stuck and stops, and the watch is not keeping accurate time. Sold AS-IS for repair or restoration.

Specifications (measured / verified):
- Brand: Hamilton
- Model Name: Chrono‑matic Cal.11
- Reference: 11002-3
- Movement: Mechanical Automatic (Cal. 11) — movement photos included
- Case width (without crown): 37 mm
- Case thickness: 14 mm
- Lug-to-lug: 40 mm
- Lug width: 19 mm
- Dial: Blue with 2-register chronograph, date at 6, tachymeter rehaut
- Case material: Stainless steel (caseback stamped Stainless Steel)
- Crystal: Domed (some scuffs/marks visible in photos)
- Strap: Aftermarket leather strap
- Box / Papers: None

Condition & Known Issues:
- Condition: Used vintage — case and caseback show surface scratches consistent with wear. Crystal has light scuffs visible in photos.
- Movement runs but the chronograph has a fault: the chrono will start but can get stuck/stop during use. The watch is not keeping accurate time and requires service.
- Caseback stamped and photos show model reference 11002-3 and Hamilton markings; movement photos provided for buyer inspection.
- Strap is aftermarket and included. No extra links, hangtags, box or warranty card.

What’s Included:
- Hamilton Chrono‑Matic Cal.11 Ref. 11002-3 (watch head with aftermarket leather strap attached)

Recommendation:
This is a great project/vintage collector piece for a watchmaker or enthusiast familiar with Cal.11 chronographs. A full service and chronograph repair/regulation is recommended. Sold AS-IS for repair — I will accurately describe and photograph any additional questions or requested detail shots.