Help with Identification please!

[RogerKP]

This 13mm round has a strange case or "thimble" around the top of the projectile.There is no fuse - can anyone tell me anything about this capping? Should it have a hole in the nose? Basically, how did it work?
Thanks.

 

[hasag]

Incendiary with white tracer

 

[rigby]

German 13mm MG131 incendiary (red) Tracer. The fuse is the primer 1465.

 

[RogerKP]

Thanks, Rigby.
Can you tell me if there was also a yellow explosive version of this round?
Roger

 

[rigby]

The following cartridges were available for the MG131.
HEI-T
HEI-Dim Tracer
API
AP-T
AP-Dim Tracer
AP TP-T
AP TP-Dim Tracer
HE TP
HE TP-T
HE TP-T
and your Incendiary.