Patent ID: 7281845

Claim:
A watchcase comprising: (a) a lower case characterized by a first annular recess for receiving an optically transparent cylinder and a timepiece support for receiving a timepiece mechanism; (b) an upper case characterized by (i) on the bottom surface thereof, a second upper annular recess for receiving an optically transparent cylinder; (ii) on the upper surface thereof, a track for removably receiving and securing an ornamental top and wherein said track in said upper case is characterized by at least one groove for receiving a bayonette; (c) an optically transparent cylinder placed in said first and second annular recesses and between the lower and upper cases wherein the lower case, upper case and optically transparent cylinder are fixedly connected and (d) a timepiece mechanism attached to said timepiece support comprising a cylindrical band having time increments placed thereon such that the time increments are viewed through the optically transparent cylinder.