Eames Time Life Executive and Lobby Lounge Chairs  

Thanks Kin,
You are starting to sound like me now.  (Okay, well maybe not THAT bad, but you are getting there)
Are you going to go down the same path of insanity with these Time/Life chairs that CONSUMED you with the 670 Lounges? I'm just kidding. Of course you are! How could you not?
On several occasions I have purchased Eames bases just to see (or have) an example of each obscure variation in the developmental evolution. 
And I have noticed that even when I am discussing the above nuances with knowedgeable people (such as yourself)  part of me doesn't want to admit that I am THAT far gone on the stuff.  But I am.
So it is great to see your unabashed excitement over what looks like two identical chairs.
I can totally relate to that, and I can't wait to see the side- by- side comparison. 
But you better pray that there are not nine more incarnations of this chair, because you WILL be buying them. All of them. 

No, Eameshead, the 670/671 is still my main center of insanity, with the plywood series trailing quite far behind. 
I probably still have WAYS to go before reaching your level of sophistication and, for better or worse, obsession. 
I'm hoping to get a side by side this weekend. Stay tuned!!

Here they are! Let me know what you think. 

Beautiful chairs Kin. 
Now I get it.
They are not at all the same. 
(And this is not a haiku)
I like best the side angle view of the low lounge "lobby" version. 
The higher version looks more formal, like it was intended for some serious work.
But I love the casual mood projected by the relaxed angle of the lower chair. 
Probably because I like the optimistic idea of goofing off and hanging out in the lobby.

Thanks, Eameshead. Always appreciate your words of encouragement and the way you describe things with such unique perspective and sense of humor =)
Yes, I love these twin (apparently franternal) brothers: so similar and yet so different. The fatter brother is more comfortable for longer term seating whereas the slimmer guy puts you in a position to work but when you need to stretch up a bit, the tilting mechanism is great. 
Can't say enough nice things about how the old leather feels so incredible. I still wonder why the lobby lounge chair is no longer available these days. 

If you want to really obsess, start looking at the different bases/ feet and see if you can determine when they switched from the shorter foot to the taller one. And why.

Pegboard, please enthrall me with your knowledge. My understanding is the base on my lobby chair is a version that came after 1969. I don't know if the taller base preceded or followed mine actually. As to why? To increase comfort?