Clothing and equipment regulations (I have the regulations) changed almost constantly over the years beginning in 1933 when the first standardisation occurred and as Crack said, these do not show the Kletterweste as an
official uniform item for anyone other than females. Now, regulations are one thing and reality often another when money is tight , an organisation is rapidly growing and where the supply chain needs time to produce the clothing and equipment needed so yes, we know of course that non-regulation items were worn and that they can be seen in photos. However, that only serves, at best, as indirect evidence so unless you have an item that can be unequivocally identified as being the actual item that you see in a photo it simply isn't enough to say "this item is likely to be HJ BDM etc because I saw someone in a photo wearing something similar".
The reason why post-standardisation (more particularly RZM-regulated) items are often preferred is because we know how they were made and can therefore say with more certainty that a given item is "real". Basing judgement of the combo in post #1 on photos is, as Christian alone shows, unreliable. The Schirach photo shows him at a young age and is likely from 1932. He appeared at the 1932
Reichsjugendtag wearing a Kletterweste too but try to find a photo of him wearing one post-standardisation in 1933.
Regarding the buttons: the same regulations that stipulated the Kletterjacke for girls also stipulated the button type which, I think, is the reasoning behind Crack's question.
Sorry if I come across as harsh. I mean no offence and am not accusing any correspondents on this thread of doing the opposite but personally I have always fought against the "everything is real until proven otherwise" mentality that I often see on other forums. The amount of trash getting the thumbs up on certain sites and the endless amounts of "dealer A says these are real", "this guy is a moderator and wouldn't lie" and "dealer B's
book shows these as real so mine is too" only lines pockets and often has little to do with history.