Each bearing is sealed in an individual Plastic bag.  18 bearings available
Bag is printed with the wording :

                              NTA - 815
                       THRUST BEARING   
       LUB. 01 PROTECTED WITH SLUSH  
            LUBRICATE BEFORE USING  

                              SEP 86

From elsewhere data was found  :  Bearing No. : NTA815   :   Bore Diameter (d):  12.7mm  :  Outside Diameter (D):  23.8mm
Dynamic Load Capacity (Cr): 5738N  :  Static Load Capacity (Cor): 16280N  :  Maximum Rotational Speed (Oil): 19000rpm