(!!) (Good Value Single) 12AT7 Mullard made in Hyperlec Brive France NOS 1970's (10.2/10.8ma)
1 low noise tube) 12AT7 Mullard clone made in Hyperlec Brive France NOS 1970's
1 section) 10.2ma Gm=5100
1 section) 10.8ma Gm=4800
Hyperlec (later known as T.R.T and R.T.C.) was an electronics factory in Brive (a.k.a. Brive la Gaillarde), which is a town in the Corrèze region of France.