681st Missile Regiment
681-й ракетный полк
Military Unit: 12413
Activated 3.64 in Kostroma, Kostroma Oblast, under the 10th Guards Missile Division.
The regiment controlled site BSP-11 with 3 R-16 (SS-7) silos.
The regiment stood down and was disbanded 10.3.76.
US designation 1960-1969: Kostroma ICBM complex (Launch site E). Type IIIA silos. (57 57 36N, 41 13 47E):