nice wheel, with plenty of paint left!
here's a map of the very last major German offensive: Operation Frühlingserwachen ("Spring Awakening") - I marked with red "X" where the 5 wheels were recovered from.
The "X" near (south-west) Budapest is where the 2 wheels were recovered near the town called 'Szászhalombatta' - the"X" south-west from "Lake Balaton" is where the 3 wheels were found.
These 251s were destroyed in this offensive most likely...
Operation Spring Awakening - Wikipedia, the free encyclopedia
and here's a photo from the offensive - the vehicles feature camo paint ("Dunkelgelb" base color with assorted patterns) - incl. the 251: