Here is at least some information for you. I wish that we had a sewing machine expert on this site, but for right now, we don't. Hopefully, others will be able to provide more information. Maybe someone will come along who really knows about sewing machines, their history and also about you're your particular machine.
If you think that your machine was manufactured during the 1930's or 1940's, then sewing machines that were sold by Montgomery Ward were manufactured for them by 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.
Is this sewing machine something that has been in your family for a long time? Whether it has much monetary value depends on its condition, beauty and what someone would want to pay for it. However, what something is worth sentimentally can be priceless.
A lot of people will say that the old machines don't have much value because they keep appearing in yard and garage sales, etc.
However, some of the machines from the early era of them can be quite beautiful in the artwork on the machines themselves and also in the cabinetry work.
They can make a nice display in the home if you get creative and put some things around them that are also from the same era from when they were made. Conversation pieces.
In my home, almost every piece of furniture has a story behind it.