The Amano TCX21 clocks are barely affected by heat, humidity, dust, sunlight, or vibration,
and they cost less. They are made in U.S.A. (not China): 34f to 110f, 0 to 90% humidity. Amano TCX21's can be repaired.
They also use standard paper time cards, gears, motors, ink ribbons are are repairable:
Amano TCX21 Click on the image below.

Amano is in Loveland, Ohio (Cincinnatti), and Roseland, New Jersey