The P-40M Mechanical pilot watch by Build Your Own Watch

P-40M Mechanical Pilot Watch

Hand Assemble Your Own P-40M Mechanical Pilot Watch.
We Provide The Parts & Step by Step Video Instruction;
You Provide The Tools & A Steady Hand To Have A Pilot Watch Built By... You.

Complete Build Your Own Watch Kit


Thin Pilot Style Case Design,
with Aviation Clock Inspired Dial

  • Double Domed Sapphire with blue inner AR coating
  • Black with 2 layers, first layer sunburst, second layer vertical brush
  • BGW9 Superluminova
  • 40.5 mm 316L Stainless Steel
  • 9.29 mm Thickness (10.29 including domed sapphire)
  • Stop Seconds (Hacking)

5 ATM Water Resistance

Sapphire Crystal

Sapphire Crystal

Sellita Caliber SW215-1 Movement

Manual Wind
19 Jewels
42 Hour Power Reserve
28,800 Beats per hour
Date Complication 6 O’clock
Automatic Mechanical Watch Movement

The P-40M Mechanical pilot watch is inspired by the Osh Kosh Grand Champion restoration of the P-40M by The Tri-State Warbird Museum in Cincinnati, Ohio.

Over 35000 hours of painstaking restoration of every part, every wire & bolt to their exacting 1943 specifications makes the P-40M one of the most accurate P-40 restorations in the World.

The P-40M Mechanical pilot watch is in homage of the Waltham 8-day clock in the P-40 at the time which adhered to the A-11 specification set by the US Military for cockpit clocks.

Portions of each sale go to the Tri-State Warbird Museum for future warbird restorations.

DIY Wrist Watch Kit

Build Your Own Watch is the first watch company to offer self-assembly with free, step-by-step video instruction.

Professional Assembly

Buy the P-40M Mechanical direct from Cincinnati Watch Company, assembled with a 2 Year Warranty.

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Build Your Own Watch Tool Kit

Watchmaking Tools Sold Separately. We recommend the quality tool sets available from Cas-Ker Co. Cas-Ker’s complete tool set includes everything you will need to complete a watch build yourself. If you prefer to purchase tools individually, here is a list of recommended tools to complete your build. You may have many of the tools you need at home already!

Tools List
Beginner Watch Making Tool Kit