what driveline do I have on my LandPride RCR-1872?

[Granite Tractor]

From my RCR1872 manual. How do I tell which driveline I have? I can't find any obvious indication on the unit.

 

[jeff9366]

RCR18 SERIES ROTARY CUTTERS​

Land Pride's RCR1860 & RTR1872 Rotary Cutters are ideal for light-duty maintenance around the farm, on gently slopes, or slightly contoured right-of-ways. A fully welded deck adds additional strength while the floating 3-point permits the deck to hug the terrain for a quality cut. The cutters have a category I three-point hitch and are Quick Hitch adaptable. They are offered with a standard ASAE Category 3 driveline with either shear bolt or slip-clutch protection and either a laminated or solid rubber tailwheel.
Available Models: RCR1860, RCR1872

 

[cathy liebchen]

The question is which slip clutch, probably the first one

 

[monkeyduster]

I have a RCR 1872 and the manual and driveline sticker showed Part# 312-728A which replaces 826-656C. The chart I have shows the same spring measurements as the 826-656C.