After looking at the sites you you good folks pointed me to, I have to agree that it is the Type 99 in 7.7 mm. From what I can tell, that translates to .303. Prices are all over the place but as I suspected, they aren't worth a lot. I don't see many list for sale with the bayonet so that might add a bit but it doesn't matter, I'm not selling it anyway. Thanks for the help folks.
For what it's worth, I doubt I'll ever shoot it or even try to find any ammo for it. It's just a cool old gun to look at.
He wasn't a big gun guy. Just something that he ended up with from his WWII days I suppose. Found his Navy flight jacket, leather helmet with goggles, flight suit, etc. Pretty interesting.
As for as guns, he only had this one and a couple of other very low end models. A H&R Special. It's a break top 9 shot .22 long rifle and an old H&R Gamemaster 12 gauge bolt action shotgun. Neither are worth much of anything but I'll probably just hang on to them anyway.