4550 and 4551 digital wall calendar clocks

with numeric date

4550x.057.Y.S calendar clock with 57mm – 2.3″ yellow digits
also available as 4551x.057.Y.S model with month – day – year date display
Maximum viewing distance: 25m – 75′
4550x.100.Y.S calendar clock with 100mm – 4″ yellow digits
also available as 4551x.100.Y.S model with month – day – year date display
Maximum viewing distance: 50m – 150′

World Time Wall Clocks – Overview

4550 series calendar clocks display the numeric date and time. They are available in a wide range of high quality case types and finishes for use as stand-alone clocks or as part of a synchronised system in the most demanding professional applications.

ethernet ntp versions with POE option – many other synchronisation options – infra red remote

Features, options and specifications

  • standard and programmable operational features
  • time synchronisation options
  • case types and finishes
  • environment, accuracy and international standards
  • up/down programmable stopwatch operation
  • optional temperature display
  • order specification codes


model digit height maximum viewing
size – width x height x depth weight
4550x.057 57mm – 2.3″ 25m – 75ft 450 x 230 x 58mm – 17.7″ x 9.5″ x 2.3″ 4kg – 9lb
4550x.100 100mm – 4″ 50m -150ft 800 x 420 x 66mm – 32.6″ x 16.7 x 2.6″ 8.5kg – 19lb
sizes and weights are for .S. single sided wall mounted clocks