[GreenKeys] Somewhat OT- Electric Digital clock

[Bruce Gentry]

Because we discuss many kinds of electromechanical things her, I wanted 
to mention  a rack mounted, possibly military,  electric digital clock I 
had in the 1980s, and would like to find again.  The display used 
engraved plastic plates stacked one behind the other, each edge lit one 
at a time to display  numbers. It looked a little like a Nixie tube in 
that the numbers lit at different depths.  The time base was a 1/6 rpm 
synchronous motor driving a ten segment rotary switch that reminded one 
of the communtator in a model 14 TD. These segments drove the seconds 
figures,  when 9 was displayed, a relay and condensor timer was charged, 
and when the brush crossed to 0, a carry pulse was generated to advance 
the tens of seconds. It and all the remaining digits  were driven by 
step switches, each cascaded by the same sort of relay and condensor 
timer. It was neat to see and hear, but I foolishly got rid of it. Has 
anyone seen one of these, and better yet, does anyone have one they 
would part with?

Thanks, Bruce Gentry, KA2IVY