I was the one who made the suggestion, and you were right to emend the ad, if I may add! You don't need to be an expert to know the differences between M and LTM, and it is important to note that this lens is LTM because I believe Voigtlander eventually updated this model to M-mount only. The LTM-M adapter simply screws on/off the lens, making it more versatile.
I have owned the 25mm Snapshot Skopar, and I think it's a terrific, terrific lens. I agree with your statement about the ease of using zone focus with this lens. Very good price, by the way, since you include the viewfinder.