Old Pioneer SE Monitor headphones?

[darklife]

Hello. I'm new here and have asked this question to many now and still have no answer. I got these headphones at a junk store for 5$ and they are in great condition except one thing.. the label on the one headphone is missing and the other only has marked Pioneer and nothing more. So I have no idea what model these are. From looking around on the net the only thing that looks somewhat like these is there SE Monitor line of headphones but even then mine must be older. They mostly look like SE Monitor 10 but mine are bigger, rounder and more classic looking. Does anyone have info on these, model, year, anything?!
I'm going nuts trying to figure out what these are..
Thankyou.

 

[darklife]

After searching this forum I'm guessing they are 10r. Has anyone owned these before and what did you think of them? I really like the sound they give. The bass is full and covers the mids well. The highs are a little off but I think its an impedence mismatch on my amps side. They are hard to drive off anything small like walkmans or ipods. They are very heavy and annoying after an hour of wearing them unless I lay or recline but I have a large head anyways so they fit nice. Either way for 5$ I must have got a great deal since out of all the classic headphones I've ever had I like these the best.
So any info on these oldies is still greatly appreciated.

 

[Claus1100xx]

I'll audition them for you

Seriously though, they are a pretty cool looking phone. Wouldn't mind a listen and it could definitely be a diamond in the rough.