<HTML>Ian,
The condensers on the 1915-17 720 and 730 series cars were brass and copper construction and painted. After the change to the 735 series for a short time there were some cars built that had a brass V shaped condenser core but I believe it was a separate brass shell over the condenser core. I have seen a couple of early 735 cars with that style of condenser. After that Stanley adopted the flat condensers.
For a picture check this link:
[
steamingdownsouth.com]
Alan</HTML>