To be fair both coins fall in the range of a £5-£8 rummage bin pieces so if you got them for around £3-£4 each you did ok .
They are not serious coins but beginers coins but important for getting newcomers interested in coins , I would not doubt they are authentic, few forgeries of contemp pieces exist , more recent ones are common .
The penalty for forgery was death , at the time - it put a lot of folks off , clipping was more common.