Old Ritchey Clipless MTB pedals. Have no clue about them. Any way to give them a service and test them if they work? I don't have MTB shoes but I'm thinking of
TOPO Titanium Flat Platform Mountain Bike Pedals | Corki Cycles
Ritchey Comp V4 MTN pedals - BikeRadar
Ritchey MTB SPD pedals, black, good condition | eBay
Vintage 1990s Ritchey Red Aluminum/CrMo Clipless Mountain Bike Pedals 9/16" | SidelineSwap