swisswatch(1) on Linux
The text 37f49fc4751b, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
the mother of all X Toolkit clocks
Flags it lists
-
-cff -
-display -
-ffs -
-noshape -
-railroad -
-sbb -
-tick