PCM For 1991 W250 with 5.2l, 4wd and manual transmission

I'm pretty sure I have one. Just need to confirm the year, all else the same.
Ok he's saying it's a 91'. Here are numbers he's giving me.

He claims the numbers are under the sticker by the plug??

The numbers are
0036-01 2550 530-08934

Not sure if this helps, especially if it's a 91.5 model year?

 Carl