He was born in the same crop that produced two of the best racehorses to run in South Africa, In Full Flight and Elevation.

The 1968 crop also produced the outstanding stayer Numerator which won 18 races from 1200m to 3200m and placed 23 times.

He struck a purple patch between May 1973 to March 1974 and won ten of his thirteen starts and placed in the other three.

[9][10][11] Although there were no official awards in South Africa at the time he raced he was widely acknowledged to have been Champion Sprinter over three seasons from 4-6 (1972/73-1974/75).

[14] Sentinel was thought to be the record holder of the most wins by a South African racehorse at one time.

However several horses won more races with Commando (44) and Darius (41) the two leaders and both gaining their wins in the period before 1946.