Feel Like A Heel
Necks and Heels on C. F. Martin Guitars
The earliest Martin guitars had what is known as an "ice cream cone"
heel, for obvious reasons:

Many of these necks have a raised fretboard extension, and are adjusted
by a clock key mechanism.

The most beautiful ice cream cone heel must certainly belong to this
guitar and it's twin in the Martin Museum, referred to by Martin as the
earliest instrument they know of to come from the hands of C.F.Martin
Sr., with elegant stripes of ebony and ivory.

Comparison of neck joints with clock key adjustments on the Stauffer and
Hudson Street Martins.
The first "Spanish" Martins were a distinct style with
specific features, including a line though the middle of the sides, and
an elegant heel, often made with two pieces of wood.
1840's Spanish Style Martin and Coupa


1840's Spanish Style Martin
On this 1850's Style 2-24, we can see a more conventional, and less
elegant heel, though still a 2 piece heel, unlike later Martins.
1850's Martin 2-24
I've measured a few early Martins and rated the curve of the heels with
two numbers indicating the distance in 32nds of an inch from the guitar
body to the shallowest point of the curve and the distance from the guitar
body to the peak at the end point of the heel:
Early Spanish Martin & Coupa
18/26 curve 2 piece heel
1840's Spanish Style Martin
18/26 curve 2 piece heel
Hybrid X 1-28
21/26 curve 2 piece heel
Pearl zig zag border size 1
22/26 curve heel
Pearl Rosette 1-28
22/26 curve heel
The regular zig zag border size 1
27/30 curve heel
The regular zig zag rosette size 1
27/30 curve heel
Spanish heel Style 2-24
23/24 curve 2 piece heel
The early instruments made by Orville Gibson carry on the tradition from
Spanish guitars of a back that continues forward to cover the heel, as
opposed to a separate heel cap.
The backstrip extending through the heel cap seen on the Martin &
Coupa above is a vestige from the early Spanish guitars of Cadiz, many of
which had a backstrip which continued on to the heel.
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