The date on Moroccan coins is the Mohammedan Hejira date. These dates are annotated using the abbreviation AH (Anno Hegirae), starting when Mohamed was alive around 622 AD and factoring in that Mohammedan years have 354 days.

The con in our picture is a 1 rial (10 dirhams) coin dated 1320AH, or 1902AD. There are more recent coins with 1331 an 1336 dates on the side opposite the star. Here are some typical catalog values. All are silver coins.

1/4 RIAL 1320 and 1321 (23 mm diameter, 0.168 troy ounces silver)
worn: $6 US dollars approximate catalog value
average circulated: $12
well preserved: $60
fully uncirculated: $200

1/2 RIAL 1320 and 1321 (30 mm diameter, 0.335 troy ounces silver)
worn: $12 US dollars approximate catalog value
average circulated: $25
well preserved: $120
fully uncirculated: $350

1 RIAL 1320 and 1321 (32 mm diameter, 0.723 troy ounces silver)
worn: $25 US dollars approximate catalog value
average circulated: $70
well preserved: $180
fully uncirculated: $400

1 RIAL 1331 and 1336 (32 mm diameter, 0.723 troy ounces silver)
worn: $12 US dollars approximate catalog value
average circulated: $20
well preserved: $60
fully uncirculated: $120

Use the Important Terminology page to convert catalog values to actual values