the old original Sharp "Talking Time 1" had several stop watch modes. Most who still have them won't give them up because of there many fancy operations, but you might put out requests wherever you think appropriate for a spare one.
I believe the Braille'n'speak has a stop watch, as does the robotron Aria, a 1990s similar product. I know an engineer who has at least prototyped one, and will write him and see how it goes. There may well be other talking clocks out there with stop watch functions. Tom Fowle
