Identifying early track

Hi all,

I posted a question in the toy train forum over the weekend but did not receive many replies. Perhaps one of you can help.

I anyone knows something about early O-gauge 3 rail, can you check out that post and see if you can identify some unusual track that I was given? the other post is here:

http://cs.trains.com/trccs/forums/p/160080/1764588.aspx#1764588 with additional photos and information.

The track has four cross-ties and its profile looks like this:

Thanks,

Karl