model 6089 lot numbers: C4-03103 thru C4-03707. model 6091 lot numbers: C4-03601 thru C4-03691. model 6092 lot numbers: C4-03110 thru C4-03684. model 6093 lot numbers: C4-03136 thru C4-03607. model 6094 lot numbers: C4-03501 thru C4-03610. model 6663 lot numbers: C4-03055 thru C4-03741. model 6663 lot numbers: C4-03280 thru C4-03445.