20x138B Solothurn Export Loadings?

I have two odd colour codes on 20x138B German? that were bought as Export loads.The brown one came with a card tube with a brown band at the top. H/S is
P *fancy G 13a 39. The Yellow one is H/S P * fancy G 24.
I assume both are AP with white trace but why not a black projectile?
Who is the G marking? I guess the P is Polte? Any help appreciated.20x138%20German%203|690x693

The Projectile photos.20x138%20German%203

Different countries have different color codes.
These were made for Sweden.
Yellow: AP
Brown: TP
Both are tracers.

“P” is Polte.
The “G” is unknown.
And the cartridge is not to be called Solothurn but Rheinmetall.

Thank you EOD for identifying my 20x138B as Swedish Export loads.
I did not even think of Swedish colour codes.