Hello
I've had this guitar for a while now and it's been driving me crazy trying to figure out exactly what it is, so I joined this forum in hopes of learning a little bit more about it and putting a year & model to it! I've been playing guitar for a few years on a cheap Yamaha guitar and my grandfather very kindly gave me his as he doesn't play much anymore (it is a marked improvement haha). He got it second hand as a teenager in the 60s and doesn't remember a lot about its origins. I don't know a whole lot about vintage acoustic guitars, but I feel like I've looked everywhere I can't find anything matching it. The closest I saw was some sort of 450, but there were still differences (the colour or headstock looked different, there was a logo printed on the body, it didn't have a pickguard, etc).
There's one modification to it that I could see--the tuning machines had been replaced with what appeared to be Danelectro branded tuners, which I thought was... fascinating. I'm not sure if he got it like that or not. There's a faint imprint around where the old ones were and the old holes have been plugged with dowels. I couldn't see any other modifications on the surface.
Here are some pictures I took:
https://photos.app.goo.gl/yJUBgN1N8t9tq2S59
I'd be glad to take more if that's needed. The back and sides of the body and the back of the neck and headstock have a little bit of flaming around the edges. The top appears to be plain.
I'll be embarrassed if this ends up being obvious or easy to find out and I just couldn't for some reason, lol... Thank you for any help!!!