Ok, upon further investigation I found that there was indeed a sediment bulb that looked quite a bit like the one I posted previously, but with no hex at the top in 1912, which were made of brass.
Which made me change the title of the second one to 1913-1927. These were made at first in brass and then in cast iron. Today's replacement bulb offered by the vendors is made of brass and says it fits 12-27 under the seat tanks or all frame mounted tanks
Which of course it does the only change between 1912 and the later one is the 12 is without a hex to wrench the bulb onto the bottom of the tank.
New thinking, Steve Jelf brought this to my attention...can you guess what it was?
I like the idea of the 2903BSC filter but I donít think it was a Ford supplied part. I first saw them on early VWs when they had the on-reserve-off tap. There were articles in The Vintage Ford on how to adapt the VW part to the T sediment bowl.
The part does not seem to be available from the usual vendors, Langs and Snyder.
The drain tap looks better without the land for the washer.
Allan from down under.
Tony, I got mine from Langs and it just fits into the top of the sediment bulb where it fits into the tank...its been doing a fine job for 6 years now on my original tank (lots of rust particles).