Up for sale is this beautiful Eterna Birks signed Challenger
 
Case Width: 34mm
 
Case Thickness: 10mm including the crystal
 
Dial: Original, signed Eterna Birks Challenger
 
Hands: Original
 
Case Material: Stainless Steel
 
Case Marks: Engraved A.L 3637497
 
Crown: Stainless steel, unsigned
 
Crystal Material: Plexi
 
Lug Width: 18mm
 
Band Material: Stainless Steel
 
Condition: In good preowned condition
 
Movement: Mechanical
 
Service History: Unknown