I bought these a couple of years ago for next to nothing. They are Slazenger Ben Hogan “Swingweight Plus” irons, 2 iron thru Equalizer and Exploder and matching putter. I’d pick the vintage as being late 1950s-early 1960s as they have the TT “Rocket” shafts and the head design looks like it’s modelled on the Hogan “Precision”. As I understand it, Slazenger made Hogan and other clubs under licence for non-US markets. I’m guessing these ones were either made for or in New Zealand, based on the serial number which is NZ 00089 (I’m in NZ and got the clubs locally).
Have only just got around to measuring the dead weight and swing weight.
The 5 iron came out at:
Dead weight: 461g (16.25 oz)
Swing weight: E1
So yes, I think the “Swingweight Plus” name is justified!
Also, note the length of the hosels and the location of the grooves in relation to the heel and toe - sweet spot obviously a lot closer to the heel than modern clubs.
Cheers,
Dan.