Series 72/73 was introduced as the original four-door commuter train for busy routes such as those in the Tokyo metropolitan area. With the debut of the 101 and 103 series, these trains were repurposed for local lines in the suburbs of the metropolitan area, replacing pre-war model electric trains and continuing their active service. On the Yokohama line, they were in service until 1979, marking the final years of their operation in the Tokyo metropolitan area.
- High-grade (HG) specification
- The SAHA78 reproduces the modernization model with aluminum sash two-stage windows, newly crafted
- The odd-numbered KUHA73 modernized vehicles are equipped with direction indicators and lack air pipes on the front, while the even-numbered vehicles recreate the 600 series modernization model
- The KUHA73 600 series recreates the appearance with DT17-type bogies
- Can be combined with <97212> to recreate a 7-car formation as seen during rush hour
- Gray H rubber recreation
- Vents installed on the KUHA73-600 and SAHA78, with the KUHA73 modernized vehicle offering a choice between old and new models
- Lightning arrester installed
- Head and tail lights, and the front display area illuminate with warm white LED
- The front display area illuminates with a near-white color using color prisms
- The front display area comes with pre-printed options "Hachioji, Haramachida, Higashi-Kanagawa, Isogo"
- Head and tail lights, and operation number display area equipped with a continuous lighting circuit board, with an ON-OFF switch
- Equipped with a diameter-piped close-coupled TN coupler (SP)
- The driver's cab side of the leading car features a small-receiving TN coupler
- Car numbers are selectable with included transfer sheet
- Equipped with a flywheel-powered system
- New electrical collection system, with black wheels
- Equipped with an M-13 motor
- Compatible with interior lighting kit Tomix 0733
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