Magazine identification

Those are stripper clips, they came in 2 types, the type I with the magazine adapter (spoon) attached was used from 1945-1969. the type II has a removable magazine adapter and was used after 1969. The ammo that was on the stripper clips came in 6 pocket cloth bandoliers, 2 10 round clips per pocket for a total of 120 rounds per bandolier. 

I have some carbine ammo in strippers and bandoleers that were purchased at Camp Perry in the late 80's/early 90's when I was a teenager.  Dad and I went to the matches for several years and one of the vendors had some carbine ammo and Dad picked up a can. 

their SK for standard pro was reported with a Type one plate. 

Another is that someone put together the mag. Many were disassembled for cleaning and parts mixed.

It is also possible that one new in the wrap has not been observed or reported. Unfortunately as time goes on it is highly unlikely it can be proven. 

I apologize if this as already been dealt with:

Is there a way to approximately date magazines? type of plate comes to my mind but if so how that is dated?

Is type 5 WW2 period?

Also, I have a K.I.(upside down) with hole and type 2 plate without the K.

And a SK (upside down) without hole and type 2 plate with the K (back of the K facing the front of the magazine).

Both are new but shows storage damage (I have 5 mags which were distorted and I tried to correct them: So far I succeed with 3 the 2 others needing to be adjust some more) .

I also take again the chance to ask about scarcity of mag.

Some threads here with tips about posting photos.

if you let us know what browswer you are using etc, that will help with specific methods.

As far as the mag.  Go to the list linked earlier in this thread.

Look under Inland and yoiu'll find your maker stamp.

Then look at the baseplate.  The types progress chronologically and are illustrated at the bottom of the page.