Help on identifying these WWII wings - Possible Robbins pattern?

[5thwingmarty]

I have one just like yours, and this one as well.  I understand this is the mark of Jack Heller (Heller), who did not begin offering wings until after WWII.  My guess is these were made by the same company either for Heller, or Heller acquired the dies.  I keep these in the same case as all my others in this pattern, 

 

[Histres]

Here is a pinback, gold FS, with the small STERLING mark.  Interestingly, the pattern on the shoulder is the same as the other Robbins wings in the thread, but just stretched out.

[rathbonemuseum.com]

Marty,

 

Hi, reading with interest and don't have new evidence to help. But reviewing all the threads i note these pics from @Tim Bpost from 2014 really highlighted the pattern in discussion and I want to reproduce them here because they were so specific and clear. From the @Tim Breview, he hypothesised that the wings might be Coro pattern based on post-war 12C marked wings. In reviewing those wings, I could see elements of design consistency but not an exact match to the pattern shown below. In looking through the @John Cooperpost of 2008 that you commented and added pics to, it seems that the real connection in pattern is to the Robbins "Flying R" post-war wings. Especially in terms of the shoulder marks and the last two small, dwarf feathers on the inside left wing.

[rathbonemuseum.com]

Now here are the wings @Tim Bshowed in his 2014 post with post-war flying R Robbins wings that were in the 2008 post

[rathbonemuseum.com]

The backs of both the WWII pattern and the later flying R pattern nav and aircrew. I would say the difference is saving on materials and a different pusher for the die. Very common in progression of manufacturers to find ways to save on materials.