A quick search turned up a German bicycle historical group at: http://www.historischefahrraeder.de/index.php?article_id=1
I can almost puzzle my way through with what's left of my high school German, but you can also use babelfish to translate the site. There is a message board, and probably a post in English with a picture will get a response.
They may have some more information for you. What hubs does the bike have? that could provide a clue or two.
@Mercian do have any info on these bikes? Wondering if they were a wartime bike used by the German military or maybe more of a prewar era civilian model? A seller has one posted as WW2 era. Anyone have any ideas on them? Thanks for any info. Appreciate it, Bob
They are difficult to research, since Westfalia is a region of Germany (famous for a type of White Horse, hence the badge), and the search term Westfalia Farrad brings up bicycle shops in the area.
In conclusion they could be rebadged from other makes, european bike design is more conservative in the 1930's to 1970's than US bike design, so I wouldn't trust any claims for a bike of that marque to be wartime without some solid proof from the seller.
Some hope of dating is that many German bikes have 'Fichtel & Sachs' rear hubs, and these are easily dateable, assuming it still has the original hub:
Thank you sir. My searches turned up similar results. I appreciate the links. When I go to look at the bike I'll try to date it by the hub. It does have rear forks, not drop outs, and from the looks of it could be prewar. Very similar decals and headbadge as bike pictured above. If I can get it for a decent price I'll post up a new thread with pictures.
Best German bike board I have found is at: https://www.altesrad.net
The thing with German one speed bikes is that they were virtually unchanged from the 1930's through the 1980's, with a little more bling postwar. A search for "truppenfahrad" will show you what military bikes looked like. Ignore the Swiss bikes, just look at the German.