I've had these unidentified HC Edwards dice dies since 2005. I was guessing they were from the mid 50's and from Reno or Vegas. Not too many clubs had two color dice outside these towns in that era.

I sold/traded off a number of other dies but kept these, among others, thinking they might be special. At the time, all the research was a dead end.

They're listed in the Dice Catalog as unknown. I've removed the online catalog from my site but it can still be found on Preserving Gaming History as "H C Edwards Dice Dies - Black Clay catalog - Part 1, Part 2, Part 3"

http://www.preservinggaminghistory.com/other.htm

My search was sporadic but I've been trying to get an ID for these for the last 10 years.
Fortunately, there was a new find from the Golden Slot Club recently. Complete with wrappers.

Golden Slot Club 1955-1958
22 E Fremont Street
Las Vegas, NV

Girls of Glitter Gulch is at 20 E Fremont Street, just for a reference.