That’s a beauty TexasJohn. Good thread topic - I wish was more info than just tighter tolerances and greater fine tuning. These are pretty hard to quantify nowadays, and personally I doubt I could tell the difference.

Here are my two Portuguese 1937s. I bought them bare. One was badly pitted so I cleaned it up (it’s now clean above the timber line) and in the process commercialised the markings. The 1937 gives a nod to its origins. The bolt is a miscellaneous Brno bolt which is a good fit (it’s stained not pitted). The other was less pitted and I’m not sure what I’m doing with it yet - still not bolt. I will be keeping the crest.