This type of clock uses the exterior wall surface of the building as the background for the dial.
Surface mount-type clocks provide a color contrast to the background wall surface allowing for greater visual impact. Surface Mount Dial Clocks are provided in acrylic and aluminum dial styles.
Canister clocks are a complete clock assembly which is usually back-lighted. Canister style clocks are available in flush mounted, semi-flush mounted, or surface mounted styles in sizes from 24" to 108" diameter in round or square styles. Canister style clocks are available with an optional protective crystal over the face and hands in sizes up to 48" diameter.
These clocks are usually mounted on the exterior wall surface. This design of clock is lighted by a neon ring or by LED lighting located at the front edge of the clock behind a decorative bezel ring. Due to the lighting style, these clocks are limited in size to a maximum of 48" overall (41" viewing area). An area of "cut out" into the wall surface is required to allow for the clock movement and neon transformer behind the dial surface. Surface mounting adapters are available.