Yes, but that presents a safety issue because it tends to put the cut directly in front of the operator's stance instead of off to the side, so if there's a kickback it's coming straight at your face instead of hopefully past your ear.
The old left-hand saw I ran across was definitely NOT one of those pictured above. It was nowhere near that old, and was more of a flat, boxy design, I'm sure with a horizontal cylinder. I have a picture of it still in my mind but it could take days sorting through CSCC etc. to find a picture that matches.
EDIT: Well, sometimes things just work out quickly. I clicked on the "Thrifty Mac" near the top of the Mac list at Acres', and up comes a drawing of what looked like a leftie saw. After a quick search here on AS, I discovered a thread where one sold on eBay back in January. The posting is still up for the time being here:
http://cgi.ebay.com/RARE-Vintage-TH...emQQptZLH_DefaultDomain_0?hash=item1c0effd2b3
It'll likely be gone soon since I think eBay only keeps pages for 90 days after the auction end. I saved the pictures for future reference though.
I'm not 100% sure that's the model I saw, but it looked much more like that than any others posted here. It had a much longer bar though; probably 24" if my memory is accurate.
