1960s Manual Wind Watch Mens/womens Small Seconds Subdial Vintage

This is a 1964 Bulova wristwatch, model name "Engineer B".
The case has shine and gives an overall beautiful impression.
The case is high-quality gold filled.
The crown is a valuable original.
Movement: Bulova (mechanical hand-wound).
Case: Bulova (10K gold filled).
Crown: Bulova.
Number of jewels: 17.
Movement made in Switzerland; case made in USA.
Manufacturing year: 1960s.
Case size (vertical): approximately 1.26 inches (including lugs).
Case size (horizontal): approximately 1.10 inches (excluding crown).
Case thickness: approximately 0.31 inches (including crystal).
Lug width: approximately 0.63 inches.
Belt: aftermarket product.
Belt length: adjustable around 6.50 inches.
Timegrapher shows a daily difference of +25 seconds.
Operation time of 24 hours or more has been confirmed (both measured horizontally).