Hmm, I can't tell if there are threads from that picture [S[S
This is the list of changes made on the radiator from year to year:
1909 Early Brass, "Winged" Script, Machined Neck
1909-10 Brass/"Standard" Ford Script
1911-12 Brass/ Cast Brass Neck
1913-16 Brass W/ Spun Brass Neck
1917-19 Black (Steel) Shell added/ Nickel Plated Neck
1919-23 Mounting Holes Larger
1923-25 "High" design, Added Bottom Engine Mount Skirt
1925 (Late) n/a Nickel Shell Optional
1926 Screw added to Skirt
1927 Round Tube Nickel Shell; All Cars