Some hatch pictures courtesy of Keith Webb:
Close up of a Canadian hatch on a Ford F15A:
Australian roof hatch as fitted to Ford cab 13 CMPs, although this double hatches next to each other was unique to the FGT No9:
For comparison here is the Australian Chevrolet hatch as made by Holden, similar to the Canadian one but again a bit different. It has a harder rubber surround which was formed in one piece. This one is on a Wireless Signals van:
