Gearbox Mounts

Hi folks, I'm coming near the time where the gearbox is ready to be fitted. I have these two mounts which came off the original chassis but have read that they are handed, part #s, 272501 and 272498. but I can see no discernible difference between them. Any pointers to tell L from R or are mine both the same? '79 88" by the way! Thanks in advance.....

Just been and had a look at my series 3's box, it is out and in the shed at this time for repair [ no reverse]
You have two OS mounts, the NS mount is taller.

Thanks @tottot , mine was a non driver when I bought it so I guess anything could have been fitted.....

Just looking back through photos, this is how the NS was.....

Yep, that is the wrong one, they are quit different next to each other.

Got an unused 'old stock' one, so that's another problem sorted.....