Thankfully, I do have the originals on paper stored safely.
The callsigns of those ops are W7HDC, W7ALH, W7AFZ, and W7BPW They are below:
The remarkable thing about the last "QSL" card is the use of "CW" abbreviations in the actual card. Not just once or twice, but throughout the hand-written note. Remarkable. I'd like to know more about the habit/patterns of early QSL cards. Drop me a line if you have insight/references to follow up?