This vintage Bulova wristwatch from 1957 (as indicated by L7 on back) features a 23 jewel self-winding automatic movement. The watch sets and winds well and keeps excellent time to within a minute or two each day.  Please note that as shown in photo #3, the hour hand is slightly misaligned.  When the minute hand is at top center (12 position), the hour hand is behind by two minute marks.  This can be adjusted with the next service / cleaning.  The watch is in overall good to very good cosmetic condition with some scratches and wear to the case, back, crystal and band from regular use.  There is a 1/4" crack on the side of the crystal near the crown between the 2 and 3 o'clock markers.  The case is approximately 34mm in diameter across and approximately 11mm thick including the crystal. The vintage Speidel flex-band can be replaced with any 17-18mm watch band.  This auction includes a period correct Bulova watch case.  I am not sure if it is original to the watch.