Just wanted to share this. I recently purchased this medallion, it seems in pretty good shape. I saw these being used on Mustangs, but were they also used on early Cobras?
Your piece is a S1CS-19523-B 2nd Version part. It was a production part for Cobras for a brief period but Ford also included them in some early "COBRA" over the counter sales accessory kits for owner or dealer installation. Two each mascot emblems and the required Tinnerman brand push on speed nuts were in certain accessory kits. (Note: The speed nut version used in standard Cobra production was a special item for use with an aluminum body. The nut in accessory kits was a plain general purpose model.)
Based on original owner reports and pictures some early Mustangs got dealer installed COBRA something kits that included 2 each of this version of mascot emblem.
Based on emblems found included in kits, over time there were three different mascot emblem designs included in COBRA kits.
S1CS-19523-B 2nd Version (Shelby American early 1963 origin)
S1CS-19523-C (Shelby American mid 1963 origin)
C3RA-14225-A (Ford Motor Company circa late 1965 origin)
Note: Most of the S1CS-B, S1CS-C, and C3RA-A parts exactly as used in new Cobras we have found for restorations were emblems that came in some COBRA kit or another and never got installed. The packages these emblems were put in were not marked with any kind of engineering number or sales number as they were not intended to be sold separately. The packages did get COBRA kit stickers. (Unmolested new old stock 2 each emblems + 4 each generic nuts + FoMoCo envelope + COBRA sticker on the outside as the only identification = emblems that once were in a COBRA accessory. That assumes no one over time has ‘harvested’ the original emblems and replaced them with reproductions.)
Example: S1CS-19523-C emblems and their package from a COBRA accessory kit. The push nuts are still packed in the inner pack.
Decades ago I became aware of a couple of Mustangs that got dealer installed 2-4V COBRA induction kits as new cars. The corroded old emblems on the cars were like your S1CS-19523-B 2nd Version. Early 1963 Cobra mascot emblems installed on 1965 model year Mustangs. Not a big surprise I guess as there is no telling how much time it took for Dearborn Steel Tube to gather parts, put together kits, send the kits to Ford’s parts distribution network, and wait for somebody to order them. Later assembled kits came with the next design and before Total Performance® was shut down the C3RA-A emblems were included in kits.
The "S1CS-19523-B Emblem, AC_Cobra 2 9/16" - as contracted by Mr. Shelby locally legend says and used on most west coast cars prior to at least CSX2133. A key feature of this part family was the new design had to be large enough to cover the holes in the coachwork or damage to paintwork left by removal of mascot emblems installed by AC Cars. The reason was simple, to eliminate the need to do metal and paint repair before installing S1CS-19523-B emblems where AC Cars mascots had been previously. There are three "original versions" of this part. The series started with smooth chrome plating and a rounded exterior edge, next was sharp corner exterior edge with brushed satin chrome plating, and finally a return to smooth chrome plating but this time the outer edge was left much sharper than that of the first version. Both the second and third versions were available as service parts well into 1968.
In the book COBRA PILOTE: THE ED HUGUS STORY it is claimed that the original rounded corner smooth chromium plated version was discontinued due to cost to be replaced by the brushed finish part. Why the third sharp cornered smooth chromium plated version was introduced is a mystery. (Cobra Kit Note: Some of the “COBRA” accessory induction kits Ford and Shelby sold, assembled by the contractor Dearborn Steel Tube, retail included a medallion kit comprised of two of these emblems and four Tinnerman® brand push on speed nuts. At some point Ford stopped including this part in induction system kits and started using the emblem that superseded it.)
"S1CS-19523-C Emblem, AC_Cobra" - as designed by Mr. Brock. Legend says Mr. Brock hated the S1CS-B part and that Mr. Shelby gave him the go ahead to design something he liked better. CSX2133 is the first chassis known to have received this third design. We only know that because CSX2133 was a press car used for promotional work and clear photos of emblems and the chassis number markings just happened to get published in a magazine road test article. (Cobra Kit Note: Some of the “COBRA” accessory induction kits Ford and Shelby sold, assembled by Dearborn Steel Tube, retail included a medallion kit comprised of two of these emblems and four Tinnerman brand push on speed nuts. At some point Ford stopped including this part in induction system kits and started using the emblem that superseded it.)
”Ford C3RA-14225-A 2”. The C3RA-14225-A part was produced in a single cavity permanent mold by one of FoMoCo's trim suppliers at the time. It replaced the S1CS-19523-C part during 427 Cobra production and became the service part for all Cobra cars eventually. The 1965 dated parts list contains production parts for both leaf spring and coil spring cars. Its last update was 05/31/65 and the C3RA-14225-A version FoMoCo commissioned is not in the parts list at that time. The earliest printed information I have found on the C3RA-14225-A 2" FoMoCo emblem was the SHELBY AMERICAN PARTS BOOK dated December 23, 1966. The end of 1966 catalog does not mention the S1CS-19523-A, -B, and -C emblems. The late 1966 book indicates the C3RA-14225-A emblem is for "64/66 ALL 289/427" ["Roadsters"].
The November 1968 catalog just for Cobras and 427 Cobras lists the 2 -9/16 emblem as an "accessory" and the C3RA-14225-A emblem for "ALL 64/67" Cobras. As far as I know the C4OZ-19D531-A COBRA medallion kit containing two each C3RA-14225-A emblems and four each push on speed nuts was the only two emblem “kit” Ford sold separately.