Signal AN-M57 / Signal M57

[sgdbdr]

Hi,

40MM SIGNAL AIRCRAFT TRACER DOUBLE RED STAR M57 JULY 1943 FIRED CASE – CollectibleAmmunition.com – Your source for Collectible Ammunition

What's the difference between the M57 and AN-M57 signals. I can't find anything about the M57 in my docs.

Cheers,

S.

 

[Taber10]

Not an expert on signals, but I have heard that the nomenclature "AN" was added after an item had been approved for both Army and Navy use. It was not always applied, for example if the item was not intended to be used by both services.

 

[sgdbdr]

That's what I think too, but still does not explain why I can't find any docs about the "early version" without the "AN" mention.