Sh4 code

[teddeeh]

Hello guys, im trying to decipher what my pickup code is. I know its a jb, and is gibson spaced from a yamaha rgxtt (wrong spacing in my guitar from factory. Phenominal.)
So. Underneath i have a small white label with two rows
IHY47
SH4 0658

Any ideas to uncovering this code?
Cheers guys.