Highest serial number Studio Preamps?

[Whoopysnorp]

My roommate has a Studio Pre with the light-gray face EQ and serial number in the 3000s. I have a Studio Pre with the dark-gray face EQ and serial number in the 5000s. Does anybody know how much higher they get?

 

[lionel69]

SO YOU AND YOUR ROOM MATE ARE BOOGIE BUDDIES :lol:

 

[Whoopysnorp]

Yep, he's got a Rec Pre too. He mostly uses that so I use his Studio Pre around the house.

 

[Meson Boogie]

Low-mid 6000s, built late 1992.
Edit: That's mine, not how high they get.