The initials T.C.G correspond either to "Thomas Critchly GARSTANG" tobacconist and cigar merchant in Keswick (UK) or to Thomas Claud GOODING & Edward Rhymer GOODING (pipe dealers in London) trading as "Thomas C. GOODING & CO".
According to the hallmarks (see enlarged view) the pipe dates from 1890.
▲ (Left side) Cha-Cha, T.V. Pipe
(Right side) Genuine Briar
▲ (Left side) T.V. Pipe
(Right side) Century Old, Briar Italy