Brass Projectile Identification

[oldshotandshell]

Can somebody please ID this brass projectile with an aluminium tracer pocket? Weight is 64g. Length is 50.5mm with diameter between bands of 19.9mm, reduced to 18.6mm below the lower band. No markings.

 

[pysall]

Projectile, 20mm sub-caliber, bazooka, Belgian model 83mm MECAR blindicide RL83/100
Hope this helps, Rod

 

[kahu1]

Often referred to as a 'rocket' gun sub cal.

 

[oldshotandshell]

Thank you Gentlemen. Much appreciated.

 

[MINENAZ16]

this one :