Identification of 20mm cutaway

[Haenosaki]

Hello all,
Recently, I bought a cutaway of what I thought was a 20x102 ap-t projectile. It was sold with a 20x102 case, but size and shape suggest that it is a different type projectile. It does closely match the specifications of the 20x110 USN, but I only know of two ap types for this calibre and mine does not match those. It has no markings, except for a partial text, that is the end of a marking: P/W
Does anybody know what projectile this is?
It's the one in the middle of the first picture, left is 20x102 and right is 20x139.
Thanks,

 

[SG500]

Hispano AP mk 3.z

I think.....the profile looks slightly different from the line drawing I have but everything else matches.

Ref Labbett and Mead book on Hispano ammo page 13.

Dave.

 

[smle2009]

I agree Dave

Tony

 

[Haenosaki]

Thank you Dave. The drawing is slightly different, but the description of the B type matches perfectly.