Hello, and welcome to the boards!
According to the
2007 Vintage Baseball Glove Catalog Source Book compiled and edited by our own
softball66, Roger Maris was an endorser of Spalding gloves from 1960-1968. His "best" glove was the Personal Model, 42-201, 1963-1965, retailing at $42.95. That was the most expensive Spalding Fielder's glove in 1965. The Personal model changed numbers a couple of times, but it was always near the top of the Spalding price list.
Maris's other models were the Autograph, and the Professional, and interestingly enough in 1965, another Personal model that retailed for $24.95. Don't know what the differences were ... maybe some Spalding experts will come along and enlighten us later.
I did not find a 42-187 model listed in the
Source. Having watched and listened long enough to discussions about gloves and catalog numbers in this forum, my suspicion is that the glove you have is a quality glove along the lines of a Professional or Autograph model, but numbered below the Personal model designation to indicate a less-expensive glove. That is certainly not to say it is not a quality glove; in fact, I think it is a great find!
Yes, I still have my first glove.