Hi,
Yes, a holder type FT-243 labeled 3715 k.c., will contain a crystal used at parallel resonance, with a 32pF circuit capacitance present,
and will oscillate at nearly the labeled frequency. (= DX-60 specs).
You can also use a crystal in the smaller, hermetically sealed HC-6/U holder, with the same characteristics, will also work fine in the DX-60.
73