John - Glad to see your 1953 with the "Finger Grips." I have some personal bows of Bob Meaker (head bowyer at Bear after Nels Grumley left). Meaker's 1950 Alum Lam has the "Finger Grips" like yours. Also have a 1957 Kodiak with "Finger Grips". But the best "Finger Grip" bows I own are the two Bear Products Grumleys that have Bear's original version of the "Finger Grips".
Originally, I designated this characteristic as "Brass Knuckles", but "Finger Grips" is really a much more accurate description.