This might help more as long as it was not modified
This 6 Series steering valve replaces 211-1008-001 and 201-1008-003. It has the following specifications:
5.9 cubic inch displacement
Open center oil flow
Non-load reaction cylinder circuit
3/4"-16 oring ports (#8)
2500 psi maximum pressure rating
6 GPM nominal oil flow rating, 3.0 gpm recommended
Manual steering check valve
This is an OEM replacement for:
Baker # 106173, 997200, 997220, 997221
Clark # 905085 Yale # 501179502, 516491801