The Register holds the following information on J-types and J/Bs in the Southdown fleet, supplied by a Southdown transport enthusiast many years ago. The asterisk indicates that none of these vans are known to survive.

* KUF 120 J/R 1612 Southdown V19 sold 4/56 March 1950
* MUF 225 J/R 15453 Southdown V5  Brighton sold 5/58 Jan 1953
* MUF 256 J/R 15455 Southdown V6  Worthing sold 5/58 Jan 1953
* MUF 467 J/R 16261 Southdown V7  Portslade Central Works sold 5/58 Mar 1953
* RCD 609 J/R 30733 Southdown V9  Portsmouth sold 3/62 Sept 1955
* RCD 610 J/R 30782 Southdown V10  Brighton sold 3/62 Nov 1955
* RCD 991 J/R 31401 Southdown V11  Worthing sold 3/63 Nov 1955
* RUF 21 J/R 29869 Southdown V1  Portslade Central Works sold 3/63 Nov 1955
* RUF 22 J/R 30963 Southdown V12  Worthing sold 3/63 Nov 1955
* RUF 23 J/R 31364 Southdown V13  Chichester sold 3/62 Nov 1955
* RUF 122 J/R 32186 Southdown V22  Brighton sold 3/63 Nov 1955
* RUF 123 J/R 32194 Southdown V23  Portsmouth sold 3/62 Nov 1955
* RUF 324 J/R 32465 Southdown V24  Chichester sold 3/63 Nov 1955
* UUF 214 JB/MR 39465 Southdown V14  Brighton sold 3/64 Jan 1958
* UUF 215 JB/MR 39648 Southdown V15  Worthing sold 3/63 Jan 1958
* UUF 216 JB/MR 39012 Southdown V16  Portslade Central Works sold 3/64 Jan 1958