25-pin Female means that it is definately for the Amiga Serial port.
Are you sure it's 25-pin and not 23-pin?
The 7-pin din plug looks unusual to me, hmm... looking at it it appears as though all 7 pins are inline (i.e. form the edge of a part of a circle)
AFAIK there is no 7-pin din plug with all 7 on the edge of a circle. 7-pin din plugs have 6 in a circle and one in the center.
8-pin din plugs have 7 in a circle and one in the center, are you sure there isnt a broken pin in the center or something?
If it really is 7 in a circle then it's a custom plug.
In the unlikely event it's actually an 8-pin Din to 23-pin D then it could be a monitor adapter for the philips CM8833 monitor.
