Here's a few bits and pieces for you.http://www.ismacs.net/national/from_eldredge_to_national_to_janome.html
Referred to as a Late Model Paveway....http://home-and-garden.webshots.com/photo/2042848020054936530WEtskY
Referred to as the Seamstress.......(an earlier Paveway can be seen further up the list)http://pages.sewing-machine-manuals.com/173/InventoryPage/1797261/1.html?pageNo=1&catId=smmnational
Apparently the Paveway was just another name for the machine made by National for Regal.http://ths.gardenweb.com/forums/load/quilt/msg0821055918603.html
"It was made by the National Sewing Machine Company --Regal just sold it. Send me the serial number and I'll see if I can pin down a date of manufacture for it. Serial number will be found stamped into the bed of the machine under the front slide plate. Remove the plate and the numbers is at the end of the curved shuttle race."
Some information here, included in the response to someone's query about their machine.......http://www.askmehelpdesk.com/collectibles/vintage-montgomery-ward-sewing-machine-218469.html
"If you flip the machine up from the base of it, you should be able to find some numbers, one of them being the serial number, that should be of use to you in finding further information about it.
I think that it's likely that you have a machine that was manufactured for Montgomery Ward by the National Sewing Machine Company of Belvidere, IL.
There is some interesting history about the National Sewing Machine Company.
The quote below is from the following site: American Sewing Machines
This machine was made by the National Sewing Machine Company of Belvidere, Illinois which was formed in 1890 by the merger of the Eldredge Sewing Machine Company (est.1869) and the June Manufacturing Company (est. 1881). The firm appears to have specialized in producing badged machines for retailers. In 1953 it merged with Free Sewing Machine Co. but was unable to compete with imported models and the National Sewing Machine Company closed in 1957.
A "badged" sewing machine is one that has been manufactured by one company and then sold to another company for the second company to sell with its own name on it, such as Montgomery Ward did.
I'm thinking with the references I've found Seamstress most likely is the 'name' of yours, as it was made for Montgomery Ward"
.......now on to finding a date