Stig,
Here is a tactical '2' of SPABi 60.. Although the lower half of the numeral looks like our machine,the top of the figure is distinctive. So perhap,only perhaps, ruling out a 2 as the figure on 'our' machine.
https://www.airwar.ru/image/idop/fww.../spad16-11.jpg
Regards,
Clint