I've seen several scattered references to Historic Fret Wire, and was pretty sure I'd figured out exactly what it was based upon measurements I took and other resources. Earlier today I exchanged correspondence over at TGP with member "Jescar". He confirmed that the current historic Fret Wire is Jescar FW45100, which is spec'ed to be .045 tall by .100 wide, and appears to have a fairly flatter eliptical crown. JESCAR: New Dimensions in Fret Wire: Choices Text of our exhange: Originally Posted by tdarian I'm assuming your TGP name is not coincidental and that you may know the answer to a question that I have. I'm trying to determine the exact fretwire used by the Gibson Custom Shop for the Historic series. I have a 2011 R7. I read a post (LesPaulForum) claiming that the wire was Jescar FW45100, which seems about right, but was hoping for a verification, as there are some adjacent sizes (FW47104 for example). Any idea? Thanks! Tom Darian Hi Tom, You are correct about the name Jescar. We do supply the fret wire to Gibson, and the wire for the Historics is the FW45100. If you ever have questions about fret wire I'll be glad to asset you. You can reach me here or Jeff@Jescar.com. Best regards, Jeff Silver I had Michael Tuttle, who had a rare break in the action, measure the frets on my 2011 Wildwood Spec R7 today and they complied with the FW45100 spec, with a catch, and another comment I should make about a conversation I had with another very well known fret specialist yesterday who said that Gibson installs the fret wire into the fret boards prior to the boards being affixed to the necks and prior to the Plek process, meaning that the Plek is shaving material off the top of the frets to make them perfectly level. So...the catch...is that in some spots of the neck, my frets were as low as .040 and I'm pretty sure I did not cause that wear...that was the Plek. As an aside, the board itself should be pre-leveled, but the binding/nibs construction makes Gibsons approach almost a requirement in a mass production setting for them I suppose. So anyway, the Historics are now using the Jescar FW45100, but the frets may not all fully comply with the height spec due to Pleking. Still, I thought Gibson did a pretty fair job with the fret work on the R7, even though I'd prefer a less flat crown and just a smidge more height in ideally a Stainless Steel fret. That size is represented in Jescar's FW47104SS. More to come in a week or so, but I hope for some this is useful information. BTW, Jescar is considered top shelf stuff, so kudos to Gibson.