Table:
text: South African Class 16DA 4-6-2
Modification
Class 16DA 4-6-2 Builders, Works Numbers & Variations
SAR_No_ Builder Year_ Works_No_ Firebox Driver_Diameter
843 Baldwin 1929 60820 Narrow 63/1600mm
844 Baldwin 1929 60821 Narrow 60/1520mm
845 Baldwin 1929 60822 Narrow 60/1520mm
846 Baldwin 1929 60823 Narrow 63/1600mm
847 Baldwin 1929 60824 Narrow 60/1520mm
848 Baldwin 1929 60825 Narrow 63/1600mm
849 Baldwin 1929 60826 Narrow 60/1520mm
850 Baldwin 1929 60827 Narrow 60/1520mm
868 Hohenzollern 1928 4653 Narrow 63/1600mm
869 Hohenzollern 1928 4654 Narrow 63/1600mm
870 Hohenzollern 1928 4655 Narrow 60/1520mm
871 Hohenzollern 1928 4656 Narrow 60/1520mm
872 Hohenzollern 1928 4657 Narrow 60/1520mm
873 Hohenzollern 1928 4658 Narrow 63/1600mm
874 Henschel 1930 21749 Wide 63/1600mm
875 Henschel 1930 21750 Wide 63/1600mm

text: South African Class 16DA 4-6-2
Modification
Class 16DA 4-6-2 Builders, Works Numbers & Variations
SAR_No_ Builder Year_ Works_No_ Firebox Driver_Diameter
876 Henschel 1930 21751 Wide 60/1520mm
877 Henschel 1930 21752 Wide 60/1520mm
878 Henschel 1930 21753 Wide 63/1600mm

Question: What are the factory numbers if the year is 1929 and the driver diameter is 60"/1520mm on the South African Class 16DA 4-6-2?