seals

JFromm

Can anyone identify these seals? 268G 130 CR,303843,National50066 S,National162118. First two have no info on who made them.
Thanks

Courtesy Man

50066 S is for an Oliver - Farm equip like a combine (if it was just 50066 no S then Hudson application). I see no listing for a National   162118 in my 1969 National Master Catalog. Could be newer. 

JFromm

Thanks,one down and a few to go.