Can anyone pic what turbos these are?

[MELV]

Well we had a good hard look at what sort of turbos are on my car and still im not sure.

The motor is a r34gtr N1 so im assuming it has n1 turbos.

There are no tags on them and the only bit of info on them are

* AGR 121 GARRETT *

the turbos dont hit full boost till 4500ish RPM

ill attach a pic of the dyno graph remembering it was a 4wd so the graph is a little wavey from the G sencor or somthing like that.

does anyone have any idea's which turbos im running ? there are 4 diffrent types of n1's.