SJ: You are quite right (as far as I remember). Some of the other variations (according to the inimitable TRC) included a hinge-mounted circuit breaker ceiling panel, a removable panel under the baggage compartment and hand-sewn leather hydraulic servo covers.
Also, Agusta began using polyurethane paint on their production 206's before Bell, in fact, many of Bell's first 'A' model 206's were delivered with a finish which was akin to a matt texture!
Yoyo: That's a great shot of the Swiss 206 (which I think may have been a Bell as opposed to an AB). The write up gives the year as 1970 and that in 1975 the craft was sold to Italy to fly as I-NYCO and where she was upgraded to a 'B' model.