Any guesses on a date? Time period? The paint seems to have some age on it because it does have cracking. I think you may be right on the not being roo. It just may be someone's interpetation of it on the back. Do you know of any times that you have seen the 00 used on a painting?
Yes, two figures for a date is very common. So '00 would be 1900 here. However, i'm not immediately convinced the wood is that old.
Difficult to tell under flash photography.
" Panel " is normally reserved for an oak or something similar. Thicker than " board ", which is normally used when describing a lighter, thinner wood. Thicker panels tend to be much older works, whereas boards are generally within the last 150 years or so.
One of those situations where we're unlikely to confirm the origin of these paintings but my best educated guess would be an art class or similar. Very common to find people painting in the manner of a well known master or painting, but three almost identical works of an otherwise unknown subject ?