What TFS heads are these? Part numbers 59325-3 & 59340-3

The 59325-3 and 59340-3 are serial numbers and just a hunch but are they o-ringed and have one valve spring. I think the -3 might mean that they are twisted wedges with .54" lift springs. Part #TFS-51400003. I am almost certain its the serial # though. Mine are quit similar numericaly but with a -4 and I have dual springs and no o-ring. I could be way off on the -# though.
 
The one in the middle of the exhuast port is what Trickflow says is the actual part number, or serial number, each has a different number because they come off the line at different times. Whats weird is they said they were o ringed? They did not appear to be o ringed.