It appears to be a Norelco pcp90u. Introduced in 1968 an early portable television camera. It weighed 50 lbs and could transmit over radio frequencies 1 mile.
Columbo bought (or more likely borrowed, given his salary) a Seiko 6139-6005 chronograph watch. Note that he never claimed this was the victim's actual watch, only that it was the sort of watch he *should* have owned!