https://www.bankofengland.co.uk/boeapps/database/FromShowColumns.asp?Travel=NIxAZxI3x&FromCategoryList=Yes&NewMeaningId=RBELGX&CategId=6&HighlightCatValueDisplay=Exchange%20rate%20(spot)%20-%20Belgian%20franc%20into%20US%20dollar
exchange ratebelgian francus dollardata seriesspot