Can someon ID this magazine?

[TFLeader]

Appears to be 50 round, maybe 45 ACP?





Marking is:

S
294
"A" in a box

 

[jgeebs413]

Looks like one of those subgun mags probably .45 could be wrong tho

 

[jgeebs413]

quick searches bring up grease gun

 

[Zappa]

quick searches bring up thompson

Not even close.
Tommygun stick mags have a rib
An end view showing the follower would help us better.

 

[TFLeader]

Follower end photos

Not even close.
Tommygun stick mags have a rib
An end view showing the follower would help us better.

Right and left sides. The last photo shows mag with 9 mm snap caps. 45 ACP won't fit (too long).

 

[je25ff]

14.5 mm Persian

 

[TFLeader]

ID Found

Photo of back side:



Internet photo of Bergman MP-18



I think it's a match.