NSB Di3.621 in HO
The original NMJ model of the Di3.621 has no top lights and therefore shows the model as it was when it was repainted as the second unit in its class in early 1984.
This is a slightly modified version of the 621, with the top lights mounted on both cabs and the horns moved to the roof. This makes this is a model from mid-1987 to early 1990.
See lolkebijlsma.com/nmj_3621.html for more details.