shape of clock, hands, size of hands congruent or not clockwise numbering legible numbers numbers in expected positions numbers equidistant clock has moving parts? (like a cuckoo clock) acceptible shape of clock replacing battery is intuitive? can it be hung on wall easily does is chime hourly reports time with accuracy after 1 12 24 hours changing time is easy? does it have multiple time zone clocks within its face or does it have only one ? etc.,