The Tektronix 5103 mainframe was, in original 5000-series scopes nomenclature, combined with various displays to make up the products that were later called 5110, 5111, 5112, 5113 and 5115.
5103N
5103N with D12, 5A18N, 5A22N and 5B12N
5103N with D12, 5A18N, 5A22N and 5B12N