Peter Falks's accent in Columbo series

[Aav 13]

Hello,
I was wondering, what accent does lieutenant Columbo speak with?
I mean, it's oviously American. But does it have any regional features? Although the series set in LA,
P. Falk was born in NY. I also read, that it was typical of working class?

 

[NorwichEnglish]

Definitely a New York accent. Perhaps a New Yorker could be more specific. Jewish or Italian New York?
Here's a YouTube clip:
http://www.youtube.com/watch?v=y0BKM_8bpXs&feature=related