"The Rodwell New Standard Putter" was patented in both Great Britain and the US by Charles H. Rodwell in the 1920's. The object of Rodwell's club, according to these patents, was "to guide the eye of the player or focus his attention on the line of the putter stroke." Therefore, the top of the head has a semi-circular raised portion, the diameter of which is formed by a straight edge on the face of the head, and in the position which corresponds with the centre of the semi-circle is a tapered notch directed at right angles to such straight edge."
Rodwell's putters were sold for a number of years. This one is stamped "The Rodwell New Standard Putter 836" on the top of the head and includes the patent numbers as well as "medium lie / 10 oz 2 drs" on the bottom. The original shaft measures 34 1/2" and still appears to have its original grip.
For more information on Rodwell's putter, see TCA2 v2 p557.