I googled “Wima vintage capacitor” and came up with the attached images. These may assist is guessing the missing value detail.
Bearing in mind the era of the capacitor series and it’s associated likely values, I would guess that your component is 0.025uF with a breakdown voltage of 250Vac
You can still see part of the leading zero then the ‘cut’ has obscured the remainder of the zero and decimal point.
Best Wishes
Fraser