Oil filler pipe

[colin addison]

[img][img][frame][img]http://mmoc.org.uk/mbimage.php?src=1399561501_14565[/img][/frame]
Hello all
I have this strange oil filler pipe on my 1950 MM, but with a USHM3 engine. I've not seen anything like this in photos on the Forum or in books etc. It has a T-piece as shown which looks as if it might have a pipe attached to it, but if so where does this go? Is it part of an early recycling system , I wonder. It was on the car when I bought it.
Any suggestions welcome (polite of course)
Thanks
Colin

[colin addison]

[frame][/frame]

This is the photo that should have been with the note above, it worked OK this time.
Colin

[mike.perry]

Never seen one of those. The oil filler cap has plenty of ventilation without the extra pipe and the breather pipe on the tappet chest does a good job at directing fumes into the car.
I have what I assume is a Morris 8 filler pipe which is longer and is easier to pour the oil in without spilling it, I am too lazy to use a funnel. To avoid loosing the filler cap I have drilled a hole in the top and pop riveted a length of basin plug chain, forming a loop with the other end and dropping it over the pipe