As title states, I have black-and-white gauges a 931 (924 turbo). Has an 85mph green-numbered speedo. Has the 944-type multigauge pinout, which means these should be a direct swap for your yellow-face 944 gauges.
The 931 reads 38788 miles, but does not include the wiring ends. It isn't that hard to figure out without them though.
Looking for $70 shipped for the set. As I said before, these will directly swap with your yellow 944 gauges.