Model Number extra Letters

[HK1837]

They were all different age plants, and they all had processes developed over time. I think Pagewood was
the oldest during Sandman production and it did produce an awful lot of vehicles. This ended up being the "luxury" plant where Statesmans were made, plus the bulk of VB Commodores came out of there too.

[Dr Terry]

The R fooled me for 15 years, I thought my 72 coupe was a factory 253, the last numbers were QR which is the 253 starting letters but it means Q for the model( HQ ) and R (right hand drive). I believe this was only on Sydney cars as they were the only ones doing the export vehicles .

That is correct. Q for HQ, J for HJ, X for HX, Z for HZ & R for right-hand drive (not 253).

Dr Terry