They came originally with a small aluminum tag under a screw on the top, the tag had the numbers on it. Maybe post what you are using it on and someone will have an idea on what kit would be best to order.
The Carburetor Shop has the best kits, makes his own leather accelerator pumps, doesn't sell the neoprene ones which are prone to failure with ethanol. He will likely only sell you kits if you order by carb number. They are listed here for 60-64, including tripower.
http://www.thecarburetorshop.com/Kchevrolet2.htm
They would be stock kits for that year,they have a listing for 59's as well.