School(?) chair identification help please

This little guy has obvious condition issues, but I’m curious about age and maker. The only mark I was able to find is the number 150 on the bottom.

I say kid sized. I’m 5’2” and it’s low for me. I’ve found several similar chairs, with prices and ages all over the map, probably because it was made pretty much the same for decades.

 

Appears to have come from a 1950's classroom.

 

.... or 60s. Had virtually identical chairs in my classrooms when a kid in the 60s. Crack in the plywood seat makes value nil.

 

What @verybrad said, only back me up to the 50's!!

 

Thanks for the info! As I mentioned, the chair has obvious condition issues. However, I’m hoping to learn something about it, in case I run across another one, and because even when one is giving something away for free, it is helpful to know what it is.

I would love to have some idea what company made it. I was hoping someone might be able to point me to a resource, or might know something about this sort of thing. The current retail value is zero, but I’m still curious.

 

Realized I didn’t post pictures of the back.

 

Early 60's , maybe even early 70's.....bad chrome....lol..... I am semi-restoring a school desk of the same era we picked up on the curb for my 6 year old ....... dead give away on mine is the pinkish and light blue paint, definitly from my early years of schooling , even with the 1943 patent of mine.