Not real sure, but I gottem coming in a late 90's MIJ Burny super grade, I have them in a mid 80's 61 SG C...Dlx & they are my favorite HB pickup, I have a Gibson R8 to compare, the VH-1 are something else for sure ,,I Love em.........................
I have a set that I took out because they were too microphonic. I put in some Dirty Dog Humbuckers and they blow away the VH-1's. A nice upgrade if you have pickups that are dead or need to be repotted.