little help here

[John ED Renstrom]

as one does I keep scouring the web for any information I can to confirm the ID of my poncho. right now we are comfortable with calling it a armbruster utility ambulance. found this glass picture and I know I have seen that etching before. can any one Id this one for me.

 

[John ED Renstrom]

finally found it. for those of you searching for stuff the http://www.emsclassics.com/index.html is one good source for ideing things. there are a number of pictures of everything there shared by a lot of will known contributors and for the fee you receive back a large high resolution picture.
I have both contributed to the site and brought from them.

the pattern in question was used by Miller from about 39 threw the 48 year. I have found one example in the early 50s a little change in shape as the cars changed but the same pattern. this glass pictured is of a late 40s Miller ambulance.