Early Hogan registration numbers taken from September 1963 export catalogue:
1963 From N00001 to S ...........
1962 from K00003 to M............
1961 from F00002 to J40093
1960 from C00013 to E69863
1959 from B1101 to B21520
Swing weights available in 1963 related to shafts:
Hogan A shaft "flexible" D0,D1,D2,D3
Hogan R shaft "Medium" D1,D2,D3,D4
Hogan S shaft "stiff" D1,D2,D3,D4
Hogan N shaft "personal - light, stiff shaft" D1,D2,D3,D4
Hogan L shaft "lady" C6,C7,C8
Also a Hogan W shaft for some of the women's clubs....and Junior clubs (aged 10-14) ....and True Temper junior shafts in the "llittle Ben" line for ages 6-10.
I have 2 set of IPT... seem to have variable degrees of offset...not sure if that is a modification after it left the factory or if it was the original design.
Interestingly I Knew that the N shaft was marketed as the Hogan personal model with stiff shaft (presume a way of getting Ben's personal set up) but had overlooked the "light" part of the specification.