Opinions on the paint on this M1 adapter?

[KMLS]

Anyone familiar with these? It's sold as original paint, but it almost looks too good. I've looked at a couple of other examples and they seem to typically show more wear/bit of rust. Any opinions on whether the paint is original?

 

[BMG50]

You do know you can find nice examples of ordnance, doesn't have to be rust and wear all the time to be original. I would say this particular piece is worthy in any collection, at least it doesn't have Phillips screws. Although say that It seems that these grenade adaptors are a popular copy item just like German stick grenade fakes.

 

[Alan1]

Looks all right; here is another, note the different shape of the bolt heads, pace BMG50's observation, together with a beaten up example of an earlier pattern.
I have absolutely no idea what means the blue paint band.
Alan1.

 

[CPCOrd]

I have a few 1945 dated 4 prong adapters but most of my stuff is in storage or being moved to a new location otherwise I would check to see if I have any with flat type screws (I believe I may). However, most of the screws on adapters being produced in 1945 and 1945, both 4 and 3 prong adapters were using rounded dome single slot screws. The paint looks good as I have had some that came straight from the box in that condition which wasn’t that unusual 10-15 years ago. I found this picture on my phone of a display I did a few years ago and note it appears the 4 prong on very right has flat screw head and I expect it’s dated 1945 since it’s on the right.

 

[Slick]

Have accumulated these over a number of years. Never "studied" them to any degree, so not able to offer any opinions.

 

[KMLS]

Thanks all! I found this photo on an old listing (https://hessenantique.com/original-wwii-issue-m1-grenade-adapter/)

Interesting that the 1945 model has the flathead screws while the 1944 model has the domed screws. By the way, does anyone know what manufacturer J.J.N. is?

 

[CPCOrd]

Have accumulated these over a number of years. Never "studied" them to any degree, so not able to offer any opinions.
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Very nice group, the 1945 wit 3 prong is a little harder to find and I expect with the tape probably has a launcher round still inside the tube. Regards

 

[BMG50]

So is the Phillips screw a later Vietnam or Korean adaptor or a lazy fake as these adaptors are copied. I know Philips were used during WW2 but not too common at the time. Would be a interesting topic to see fakes reproductions and original.

 

[Alan1]

Here is a selection of variations, and the sight unit that could be fitted to a number of rifles.
Note the eg third from left that is dated 1961, and thus probably from Viet Nam, with a cup shaped base for the grenade as would be expected. The prongs appear to be fixed by rivets rather than screws, and this rather complicates the question that BMG50 raises. And were self-tapping screws used at some time, wch would remove one step from the production process? A small step, granted, but as quantities of ammunition were produced the savings in time and machine tools would have added up.
Alan1

 

[Antoon]

Found this one on usmilitariaforum.com

The info with it is:

Early 4 prong, Atlantic Elevator company, 3 lots after testing- lot 7 failed the ballistics acceptance proof tests. Lot 5-43.

The writer is not sure if the riveted models are production or test.