Much of what we know is scratching around between known patents, dated adverts and conjecture.
That first example with the flip-up blade holders is, I believe, 1950s. Similar cases exist for the hallowed 'Sun Ray' set and indeed, I believe these cases were made for single 'Sun Ray's as they fit just perfectly and the regular 1912s that fit in these cases do not sit flat and they have abruptly finished ends to their handles. Shaved to fit.
See here for my thoughts on these cases:
https://www.badgerandblade.com/foru...-ray-and-something-clicked-into-place.517683/
I do have a mottled green example myself, but it's under the Star brand. Made in England, most likely for the French market.
1950s, anyway ... best guess. Run for a few years, probably over-bought cases for the 'Sun Ray' run (or maybe the 'Sun Ray' was just not popular) and so filled the rest with slightly modified regular 1912s.
I'd need some time with a lot of adverts to try to pick out this case and even then, they're often not dated.