Antique golf clubs | Golf Monthly

My young nephew has started playing and my old boy was at his mates house telling him that his grandson has started golfing, to which his mate replied, he can have my old clubs if he wants, so my dad brings them home. Iv just had a look in the bag and there's a 10 iron!
So who can remember using a 10 iron? Personally Iv never even heard of them before, it's a john letters "par buster" lol.