Dating vintage dimarzio pickups

The "T" located on the top of the bobbins helped workers ensure the bobbin was facing the correct way during the winding and assembly process.

T-Top bobbins lose the distinctive square hole of the original PAF bobbins.

Engineer Tim Shaw designed a pickup that aimed to replicate the early design, reversing changes made in the 1960s and 1970s: a new bobbin without the "T", a correct small square hole back in both bobbins, and Alnico magnets.

In the mid-1950s Gibson looked to create a new guitar pickup different from existing popular single coil designs. The patent for Gibson's design was eventually issued on July 28, 1959. This registered trademark should not to be confused with original P. In 1958 the Goldtop model was dropped from production, and the sunburst Standard took its place.

Gibson had already developed the Charlie Christian pickup and P-90 in the 1930s and 40s; however, these designs—like competitor Fender's single-coil pickups—were fraught with inherent 60-cycle hum sound interference. These guitars were all fitted with PAF humbuckers, which contributed greatly to the instruments' sound.

They were replaced by the Patent Number (Pat No) pickup, essentially a refined version of the PAF.

Gibson began use of the PAF on higher-model guitars in late 1956 and stopped in around 1962.

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