1968 Bulova Banker "K". Movement and case both marked M8. Crown signed with a "B". Watch shows literally no signs it was ever worn. If it was accompanied by the original box and string tag, it would pass for NOS. Speidel band doesn't match the ads dated 1967 in the Db, but is an excellent pattern and style match.
As received, all I've done to this one is wind it. Keeping perfect time.