If you own any Fujairah coins referenced: KM#1-5, then have a look at the date on your coins, and make sure you have ticked the right date here on Numista
Gregorian dates corresponding to Islamic dates were incorrect; but got fixed now.
https://en.numista.com/catalogue/fujairah-1.html
Previous incorrect dates:
1388 (1968)
1389 (1969)
Current Corrected dates:
1388 (1969)
1389 (1970)
Please not that Krause 2016 book has few Fujairah coins dated as "AH1389-1969" which is wrong.
ALSO:
if you own KM#4 https://en.numista.com/catalogue/pieces45477.html
then have a look, as a new year line was added: (and same previous issue of dates was fixed)
1388 (1969) KM#4.1
https://www.ngccoin.com/price-guide/world/fujairah-10-riyals-km-41-1388-1969-cuid-49911-duid-135776
1388 (1969) KM#4.2
Newly added line, unlisted in Krause. Current coin image on the page corresponds to this type
1389 (1970) KM#4.2
https://www.ngccoin.com/price-guide/world/fujairah-10-riyals-km-42-1389-1969-cuid-49912-duid-135777
PS: I just started working on Fujairah coins; so editing current coins and adding new coins will be done within few days.
Have a great weekend