NJ-001: 1950's National Military Style Watch w/ Felsa Cal 690 Bidynator Auto Movement

NOTE: This is an example of a watch with a very early automatic movement - The Felsa Bidynator movements were one of the first commercially produced automatic movements.

CASE

• Case Material: Stainless Steel

• Case Back Material: Stainless Steel

• Bezel Material: Stainless Steel

• Case Ref # Back of Case: 1074

• Case Serial # Back of Case: NA

• Case Width w/ Crown: 33 mm

• Case Width w/o Crown: 31 mm

• Lug Width: 18 mm

• Length Lug to Lug: 42 mm

• Case Thickness: 16 mm

• Screw Down Crown: No

• Rotating Outer Bezel: NA

• Rotating Inner Bezel: NA

• Case Back Attachment: Screw

• Markings on Case Back: “AUTOMATIC | 1074 | WATER PROTECTED | INCABLOC | SWISS MADE | STEEL”

• Markings on Inside of Case Back: “KUHN WATCH CASE CO | SWISS"

• Other Markings on Case: None

• Original Water Resistance: “Water Protectedf”

DIAL

• Original Dial: Yes

• Repainted Original Dial: No

• Replaced Dial: No

• Dial Color(s): Ivory

• Tachometer: No

• Lumens: Yes - Faded - On Hands & Dial

• Markings on Dial: “NATIONAL | 17 JEWELS | WATERPROOF | INCABLOC | AUTOMATIC | SWISS”

CRYSTAL

• Crystal Material: Acrylic

• Needs Replacement: No

MOVEMENT

• Maker: Felsa

• Caliber: 690 (Bidynator)

• Movement Serial No.:

• Movement Type: Automatic - Bidynator

  # of Jewels: 17

• Markings on Movement: “BIDYNATOR PATENTED | NATIONAL JEWELLERS CO | SEVENTEEN 17 JEWELS | UNADJUSTED | SWISS | F690”

COMPLICATIONS

• Chronograph: No

• Stop Watch: No

• Alarm: No

• Date: No

• Day - Date: No

• Triple Date: No

• Moon Phase: No

SIGNATURES

• Signed Crystal: No

• Signed Dial: Yes

• Signed Case Back: No

• Signed Inside Case Back: Yes - KUHN WATCH CASE CO

• Signed Crown: No

• Signed Movement: Yes - Bidynator (F 690)

• Signed Bracelet / Strap: No

Please Note: While this watch was waterproof rated when originally produced, gaskets and seals wear out over time. Consequently, we do not guarantee that this watch retains its original waterproof rating. It would be best to have a watchmaker check all the gaskets and seals before subjecting it to water or high humidity conditions.