AHS3709 was sold new through Gough Industries - Los Angeles California.
It was part of a delivery to Gough Chassis numbers AHS3706 to AHS3710 and AHS3801 - dispatched on 21st and 22nd April 1955.

Original owner of the car is not stated in the Geoff Healey books, but the car was raced extensively by Jack Breskovich from 1959 to 1963 before it had a bad crash in the hands of another driver or owner.

The car was featured on one of the Austin Healey 100S facebook groups on their Chassis Monday, and as a result a number of pictures of it racing have emerged, some have been seen before.
- note for anyone searching the 100S group pages there are Two.
" AUSTIN-HEALEY 100S " the group that featured the first image and " Austin Healey 100S " - the original group.

Chassis Monday.

Name:  AH 100S #397 AHS3709 Jack Beskovitch Rce #163 date Q  - arch Austin Healey.jpg
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The car appears to have raced under the number #163 in the SCCA races in the USA, as well as some long distance Sports Car Races - the LA Examiner Grand Prix and the 3 hour Race for Sports Cars at Riverside, California.
A couple of pictures from 1959;

Pomona

Name:  AH 100S #399 AHS3709 Jack Beskovitch Rce #163 Pomona LA Examiner Road Race 8 March 1959 Q - 175 .jpg
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Riverside

Name:  AH 100S #401 AHS3709 Jack Beskovitch Riverside 3 hour race 1959 #163 w another 100S 174 kb arch .jpg
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Races from 1963.

Name:  AH 100S #398 AHS3709 Jack Beskovitch Riverside 3 hour race #163 173 kb arch R Jordan.jpg
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The Cobra in this photo is a well known car #198 and one of the first Cobra to race - in the USA

Name:  AH 100S #400 AHS3709 Jack Beskovitch Riverside 3 hour race #163 2nd Feb 1963 173 kb arch Austin .jpg
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The car with Race #180 - it is presumed to be Jack Breskovitch, going the wrong way. undated

Name:  AH 100S #402 AHS3709 Jack Beskovitch spins w Cobra and Porsche 174 kb arch Austin Healey.jpg
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Some images are from " Austin Healey " - a pseudonym for the creator of " AUSTIN-HEALEY 100S " page and others from Rainer Jordan - as shown on the photos.