GUILD introduced the Cordoba T-50 "Slim" in 1961 and made it until 1973. It was a thinline version of the Guild X-50, with a body thickness of around 2 inches. The T-50 had one single-coil P-90 style pickup with plastic cream cover from 1961-1964 and a metal cased single-coil unit from 1964 onwards. The headstock (with Guild logo) was Gibson style up to 1964 and then domed style from 1964 on. The pickguard shape also changed in 1964 from rounded to stair-step shaped.

The Guild T-100 was made between 1960 and 1972. The T-100 is a single florentine cutaway archtop with a single P-90 style pickup.

The T-250 was made between 1979 and 1982

The Guild T-50 Slim is a 2015 reissue of the 1960s thin-body arched maple top T-50 Cordoba model. The T-50 Slim is part of the Newark St. series and has an arched maple back, maple sides, and sunburst finish.The T-50 Slim has other nice design touches from the 1960s original including a Guild lyre tailpiece, center-domed headstock, stepped pickguard and ivoroid binding, The single pickup is a low output P-90 style single-coil unit. At 16 inches wide and 1.75 inches deep this reissue is slightly smaller and thinner than the original.