Swatch SISTEM51 Sistem Blue Automatic Watch Ref. SUTS401 Full set

Selling my **Swatch SISTEM51 automatic watch – Sistem Blue.

This is the classic first-generation Sistem51 look: black “constellation” dial with red dots, translucent blue case, and display caseback showing the movement. A very cool conversation piece and a nice everyday automatic.

Model / Reference
• Model / Ref: SUTS401 (Sistem Blue / SISTEM51) 

Key specifications
• Movement: Swatch SISTEM51 automatic (self-winding), approx 90-hour power reserve 
• Case size: 42.0 mm diameter 
• Case thickness: 13.9 mm 
• Case dimensions: 42.0 mm x 50.6 mm (lug-to-lug style measurement) 
• Crystal: scratch-resistant mineral crystal 
• Water resistance: 3 Bar / 30m 
• Strap: black strap with blue stitching + blue buckle (as pictured)

Condition
• Overall good condition (please see photos).
• Normal signs of use

What’s included (full set)
• Watch
• Swatch outer box + Swatch plastic travel case
• Receipt / paperwork shown in photos