whilst working on my p38 today i noticed it has a black plate on the slam panel stating land rover special vehicles, its stamped with a number and date, is this the norm and if not what does it mean?

i have watched this forum for quite a long time now solving problem after problem just reading threads, but this time i have looked through 90 pages and nothing has helped. so here i post. today i went out to my p38 and started it to drive normally, but noticed the front would not lift from...