The english weight system for anvils is in:-
Hundredweight (CWT) (112#)
Quarters (28#)
Pounds.
Therefore, if it's stamped 133, that equates to 1 CWT, 3 quarters & 3 pounds
112 + 84 + 3 = 199# total weight.
Unless it actually says 113lb or 113pds on the side, it'll use the old CWT/Quarter/pound system & weigh 199 pounds.
Just to
really confuse you, in England we don't use the '#' pound symbol. We use the suffix 'lb'
Oh, and 1 stone = 14lb :D
Don't ask me what a kilo is though. Bloody Euro-weighs make NO sense!