Anyone Know the First Production Day of the EBMM VH Guitars?

I have a Red EBMM Van Halen model that according to the serial number puts the production date at July 9th, 1991.

I had a friend of mine recently tell me that he owned a Pink model that was the 4th Pink model ever made and his production date was around July 6th, 1991. I am wondering just how early my Red example is.

The serial number is: 80134

Any info would be greatly appreciated! Thanks everyone!

Tobin