Why did some officer GSMs have only rank and name, and others rank, name, and unit?

[Kimberley John Lindsay]

Dear All,

I possess, for example, an officer group with GSM clasp KURDISTAN: impressed CAPT. C. D. BALDING.

Furthermore, I have another officer group with GSM clasp IRAQ: impressed MAJOR S. B. HAUSER.

On the other hand, another group with the GSM clasps KURDISTAN & IRAQ, is impressed CAPT. J. L. WOOLLAM, 106 PIONEERS.

Yet another GSM, with clasps KURDISTAN & IRAQ (MiD oakleaf) is impressed LIEUT. J. P. O'SHEA, I. A. R. O.

Can any GWF aficionado please explain this not unimportant variation...?

Kindest regards,

Kim.