HP calcs with clock

[x34]

(07-16-2014 08:32 AM)walter b Wrote:  Please don't forget the HP-55 and (in a way) the HP-45. Simply browse the museum you're in.

And the HP-20b and -30b also feature a RTC which allows the WP 34S to provide a stopwatch etc. Please see there.

d:-)

Thanks Walter. I am not sure HP-55/45 clock keeps working while the calc is OFF.
So, could they be used as a pocket watch?

Sure, 20b/30b are in the list.

Joe, thanks! So, these are models, which could be used as pocket (or wrist) watch: 01,17B/17BII,18C,27S,41CX,20B/30B and 48/49/50,38/39/40,39gII/Prime.
And 71,75,94,95,100,200...

What about 28C/S and 42S? Do they keep counting in the OFF mode?

tia