My digital camera doesn't seem to want to work. But it's identical to the one I pulled off of Google.(Exact match to mine)

It's also for a 1 3/4 belt. (Although it fit my 1 1/2 wilderness belt just dandy)
I'd say it would fit any Government size 1911. I'm not sure if the 4" 1911 will fit or not. I suppose it could though.
Here's the link to it on Galco's website.
http://www.usgalco.com/HolsterT3.asp?ProductID=887&CatalogID=7