This is great, Just as I found while researching, the rulers are accurate, and from research they had classified them as three periods:
1. Kingdom / Early Independent Coins (1540 – late 1700s)
In this era, Nawanagar coins were "dump-style" (thick, irregularly shaped) and heavily imitated the coins of the Gujarat Sultanate (Muzaffar Shah III).
Key Identifier: Look for the name of Muzaffar Shah III in Persian script, but with the Nagari legend "Shri Jamji" added at the bottom.
The "Frozen" Date: Most silver Koris from this long period bear the frozen Hijri date 978 ($AH 978$), which corresponds to the year 1570. Even coins made in the 1700s often still show this date.
Symbols: A prominent Katar (dagger) is often visible on the reverse.
2. Protectorate / Transitional Phase (1812 – 1850s) (same as princely state, both under British scrutinizy)
After the Walker Treaty of 1807, Nawanagar came under British protection. While the coins still looked "traditional," the quality began to change.
Key Identifier: The coins are still hand-struck "dump" coins, but the calligraphy becomes more stylized (constant fine lines i.e. Dhinglo) and refined compared to the early 16th-century imitations.
Ruler Mention: During this time, they continued using the generic "Shri Jamji" (referring to the Jam Saheb) rather than specific names of individual rulers on most copper and silver units.
3. Princely State / Modern Era (1852 – 1948)
During the reigns of Jam Vibhaji and Jam Ranjitsinhji, the coinage became more modernized and eventually machine-struck.
Key Identifier: Specific names and Vikram Samvat (VS) dates appear.
Jam Vibhaji (1852–1894): You will see his name in Nagari: श्री जाम विबाजी (Shri Jam Vibhaji).
Machine-Struck: Later coins (post-1890s) are perfectly round with milled edges, looking like modern British Indian currency.
Denominations: You will see denominations clearly marked in Gujarati or Nagari, such as 3 Dokdo or 5 Kori.
