Original Hydraulic MOOG SERVO VALVE D661-4651 Type : G35JOAA6VSX2HA 

Other models:

D661-4636D661-4640D661-4651D661-4652D661-4653D661-4697CD661-4731D661-4732D661-4746/P30HAAD6VSX2-BD661-4770D661-4782D661-4800D661-4830D661-4858D661-4866D661-4900D661-4923D661-5009D661-571C/H09HOGBENCO9D661-6305CD661-6316CD661-6346CD661-6347CD661-6373ED661-6393CD661-6405CD661-6428ED661-6460CD661-6462CD661-6537ED661-6593D661-8006D661-G35JOAA4NSX2HAD661-P80HABF6VSX2-BD661Z571C