H molded chips was made at The Burt Co in Maine.
It was distributed by the H. C. Edwards company in NY.
1950-1968 is probably not correct for the years distributed.
Mark Lighterman and I purchased about 7 years of records on the HCE company. I do not have my copy as of yet but if I remember correctly, there are records dating in the 1980's. There are also some records on a couple other molds sold by HCE.

You can get a copy of the records from Mark on CD for $15 postage included.
There will also be a copy donated to the club library at the May convention.

mlighter@bellsouth.net