Well, that a few of you were nice enough to help me understand my HP 58503A, I wonder if anyone out there has some parts for this unit. Specifically, I was hoping someone had an Option 1 Kit, the digital display and keypad? Any thoughts, suggestions? Thanks, Mark. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.