Incorrect, see pic below.
Also using your fav search engine returns many examples of AWR1612.
Furthermore to that, Land Rover Classic returned no results for ANR1612 nor did your fav search engine.
Further further to that if we want to look for faults in my info, here it is...
if you look at the OP's original pic the sagging bit looks like the later rubberized foam style which I have seen in late 300tdi and TD5 Defender, sooooo the part number is:
BTR5232

