Case and movement are marked L9. Case bezel is 10k RGP, back is stainless steel. I believe this to be a Lexington B as seen in the bulova.com ad: https://mybulova.com/sites/default/files/vintage_ads/bulova-ad-1958-9.j… .
This is the first of several watches that I have purchased from an online auction site. I am looking forward to your comments.