Yep, those are the color codes, couldn't for the life os me remember them the other day. Thanks Grumpy > The 75's are service part number 17112560, but are > engraved with 17084304 and are ink stamped Blue/Black. The 90's are service > part number 17111784, but are engraved with 5235231 and are ink stamped > Blue/Maroon.