Record 077 bull nose plane, nose screw size

[pgrbff]

I have a habit of losing screws from my planes.
Can anyone tell me the size of the screw and washer that hold the removable nose on the Record 077?
As I'm in Italy I cant simply pop out and try different screws, only metric here.
Alternatively a source for the original screw.

 

[pgrbff]

Or is there a source of spare parts for oldish Record planes?