2 New 20mm Oerlikon, 20x110, What Are They?


#1

Hey Guys,

Picked up some nice ammo today at a small local show, 3 nice US .50’s, a Chinese 12.7mm, a couple of 20mm Navy rounds, and two WWII 20x110 oerlikon rounds…

I will post pics on Monday, but maybe you can give me some guesses based on some info…

#1 Headstamp reads =M.S.=1943 20m.m.-MK-2

projectile is painted overall a dull rust red color, projectile body has stamped into it “MK 3 - 54H, 9/43, MAT”

Fuse is marked “MK-26-1-JDCO-T”

Side of cartridge case ink stamped “ZG-48NFGH43, POWDR. SPDN 5505, FZ. MK26-1 LOT 360, NFCH 9-43”

#2 Headstamp reads B in a diamond (I am guessing Bridgeport Brass…), 1944, 20MM MK 4

Projectile is painted and overall dark green with a tinge on the blue side, and body is stamped “MK 30 J-LOT 648”

Fuse is marked “MK.26-1-A.M.”

There is an ink stamp on the case “ZG-3-S-IHMC45”

The big question…what kind of rounds are these? TP’s, actual AA rounds?

Like I said, I can post pics either tomorrow or Monday…


#2

I found some good color charts after doing some searching…I think I have them identified…

I can post the charts some time if there is some interest…


#3

pz

Those sound like a Drill (Brown) and an Inert Loaded (Green).

Ray


#4
  • @ pzjgr: About those 20mm headstamps, I can tell you this: # 1) “M.S.” shell case maker stands for “Metal Specialities Manufacturing Co.”, Chicago [Illinois]; # 2) “B” in diamond frame shell case maker stands for “Bridgeport Brass Co.”, Bridgeport [CT]. Liviu 04/26/09

#5

Here are the color tables I talked about…

http://farm4.static.flickr.com/3345/3479066211_cd54c70dd4_o.jpg


#6

Another…

http://farm4.static.flickr.com/3590/3479873082_d70af8f5b9_o.jpg


#7

And the two I bought…

http://farm4.static.flickr.com/3397/3479066267_5479cba74a_o.jpg


#8

Full shot…

http://farm4.static.flickr.com/3409/3479873860_43bd8b4bc7_o.jpg

And thanks for the case info Liviu, I can suppose they are both USN issue with that info…


#9

pzjgr

Those colors are a little inconsistent with WW II USN codes. And, I misread your description of the first. I read it as brown when it is actually red, which is HE-I.

USN 20 mm Ammunition Color Codes
Type Filling Color

HE Mark 3 Tetryl White
HE Mark 3 Pentolite Yellow
HE-I Mark 3 Tetryl and Incendiary Mix Red
HE-I Mark 3 Pentolite and Incendiary Mix Light Pink
HE-T Marks 4 and 7 Tetryl and Tracer Light Gray
HE-T Marks 4 and 7 Pentolite and Tracer Blue
AP-T Mark 9 Tracer Black
BL&P Mark 3 Inert Loaded Dark Green
BL&T Mark 7 Inert Load and Tracer Dark Green with Yellow Stripe
Drill Empty Seal Brown

Ray


#10

Yeah Ray, I agree…Its definitely red…these came from that same large collection that has been for sale locally that I picked up a bunch of nice stuff last spring.


#11

Are you positive they have not been re-conditioned? The paint looks awfully good and, usually, the nose fuse is left unpainted except on drill rounds.

Ray


#12

[quote=“Ray Meketa”]Are you positive they have not been re-conditioned? The paint looks awfully good and, usually, the nose fuse is left unpainted except on drill rounds.

Ray[/quote]

Its certainly possible, but they seem to be all original to look at them…and the crimps are solid…