Not the best photos, but hopefully enough to get across my point...
On the left is our ca1920 Indian deluxe apparently made by Westfield. On the right is a ca1930 Iver Johnson.
Left: The Indian has FLAT mid-braces integral to the fork crown that extend from the crown and loop around the main braces. The top of the braces are fastened to a TWIN-lobed plate affixed to the headset nut.
Right: The IverJ has ROUND mid-braces that extend from the main braces. The mid-braces only kiss the fork blades, they are not attached. Meanwhile above, the main braces merge together before being fastened to the SINGLE-lobed plate affixed to the headset nut.
Many makers used the Westfield design. I only know of Iver Johnson to use the other design.
The Indian catalogs from 1923 onward (to 1928 or so) shown on this thread's prior pages use the IverJ design. Also in these catalogs are shown lesser Indian frames with a design similar to Iver Johnson classic arched truss frame.
Perhaps by 1923 Westfield was out and Iver Johnson was in? This might coincide directly with Harley-Davidson bailing on their bicycle line, built by Iver Johnson.
Westfield was only 10 miles from Springfield, but IJ's Fitchburg was only 80 miles in the other direction.
Can anyone confirm or deny my theory?