H. D. Smith Monkey wrench

[Neals]

Picked this up at an auction yesterday. Its marked H D Smith with patented 1900 and 2 for 1901 and perfect handle. Any way of dating this closer than between 1901 and 1930? I found lots of smaller ones online but only one mention of  a 21 inch. Is this a rare wrench in this size? Its only the second perfect handle I have seen in this area of any kind. Its in decent shape except the wood is poor but complete.