Where was the Blue Diamond Building Supplies company located in
Calofornia.  I was told they went out of business in the 60's.

Are you looking for what city they were located in and their street
address?  The Businesses Directory of the California Secretary of
State's website lists about 24 or more businesses with the Blue
Diamond name as a prefix (such as Blue Diamond Construction and
others) but none with the exact name that you gave--perhaps if you
looked at some of these names you might find exactly the company you
were seeking.  Please clarify your reason for wanting their location
or exactly what you intend to do after you get the information.  Do
you have any other information about the company--names of company
officials, what their product line was or what did they make or do,
etc., any idea of what county they were located in, are you searching
for a former employee of the company, etc.?

SINCERELY
4KEITH (I'm NOT a GOOGLE Researcher)

Keith,
I only want to know the city.  

I'm just curious because I recently bought a scale model truck with
the Blue Diamond logo. The maker, 1st Gear, doesn't know where Blue
Diamond is located. The company for which the truck was made,S&k Toys
in Michigan, doesn't remember either, but they do remember that Blue
Dimond was in California and went out of business in the 1960's.  I
think that the full name of the company is Blue Diamond Building
Supplies because tha's what is printed on the model truck.

Thanks
Ralph