4 Tari 1590 Knights Of The Order Of St. John Of Jerusalem

Hello,

I purchase this coin few days ago. It is 4 tari 1590 Knights of the Order of St. John of Jerusalem from Malta. There is no photo of this coin on internet. I heard that is valuable coin.
If anybody have some catalog with more info about value and mintage.






I found this:

Soon after, his accession as Grandmaster, Hugues Verdalle (1582-95) found the Treasury of the Order almost bankrupt because the civil wars which had been raging in France[10] had prevented any money flowing to Malta from the French provinces. So it was decided in Council on 9th [p.62] July, 1590 to resort again to fiduciary coinage "per sovvenire alle necessità del Comun Tesoro." An amount of 6,000 scudi of copper was to be minted, but the Grandmaster was empowered to mint more than that amount if he deemed it necessary. [11] Verdalle, however, seems to have minted no more than 6,000 scudi of copper. [12] The Grandmaster's copper coins were the most varied to date, consisting not only of the fiduciary four and two tarì pieces, but also of carlini, cinquine, grani, three-piccioli pieces and piccioli. [13]

Thanks.