Official Luthiers Forum!

Todd: I would think John Arnold at the UMGF would be up on this sort of thing...??
Tom

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A person who has never made a mistake has never made anything!!!

Todd, I've got a 1955 D18. I can measure whatever you want tonight if that's old enough.

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I didn't mean to say it, but I meant what I said.
http://www.brackettinstruments.com/

Todd
I can set you up when you get here . Off the top of my head the inner and outer ring is black .025 " then .130 +/- .005 spacing from the sound hole to the rings and also between the rings. So to top off you have the hole .135 1sr black .025 ring , then .130 and the center B/W/B/W/B , this is actually 2 Thin Black/White/B/W/B Inlay .070" Item # 13B070 from Martin . then .130 and the last .025 black ring.
Hope this helps

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John Hall
blues creek guitars
Authorized CF Martin Repair
Co President of ASIA
You Don't know what you don't know until you know it

John's pretty much nailed what my '55 has.

Inner ring. .030" black, .125" from edge of 4" soundhole. The soundhole is kinda worn away. The ID of the inner black ring is 4.125"

then it's .130" to really thin (.010" each) BWB, then a .030" white, next is a ring of BWB that's .010" each. another .030" white then BWB that's .010" each. Then it's .130" to the outer .030" black.

_________________
I didn't mean to say it, but I meant what I said.
http://www.brackettinstruments.com/