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Mixed
Flat
The shine of small things
time, Alarm, Alert
Black
512x512
Mixed rounded flat icon
waker, Clock, time
DarkGray
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Office Vol.3
Clock, watch, Wait
DimGray
hour, morning, Alarm
Office Vol.2
watch, time, Alert
Clock, morning, Alarm
Gainsboro
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Things
date, hour, stopwatch
MediumAquamarine
Krispicons- Modern Flat Icons Freebie
timer, Horn, Alert
Purple
111x111
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Fire
bell, danger, problem
Crimson
fire, Alert, warning
iconsimple (freebies)
timer, Alarm, watch
WhiteSmoke