Notes: 3789613M1 COUNTERPLATE Diff. locking SP1.3 LD22121 is original AGCO-MF-VALTRA product. 3789613M1 COUNTERPLATE Diff. locking SP1.3 LD221211 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849