The only differance between the 37 and the 87 is the 87 has a sear disconnector that doesn't work very well. It was suppose to eleminate the "slam fire" ability of the gun. Some woeked but most didn't.

In fact Ithica discontinued the 87 and went back to the original design with out the disconnector as a result of the poor design. If you can, buy a 37 instead.