- Emperor: from January to April 69.
Group 1: Group 1: The legends and the portrait correspond to an existing official type.
Group 2: A small mistake like a spear instead of a scepter. The rest of the coin perfectly follows the official coin. Or depreciated coin, but leaving parts showing that the coin seems to have the legends and the portrait corresponding to an existing official type.
Group 3: The existing official type is well imitated but contains one or more errors of legend, representation or degenerate style (excluding hybrid).
Group 4: The coin is a hybrid of two official types (obverse / reverse) and may also include legend errors. Or, the coin is known in another module or metal.
List of types
SECVRITAS P R Group 1
IMP OTHO CAESAR AVG TR P
Bare bust of Otho to the right.
SECVRI - TAS P R
Securitas standing left, draped, holding wreath with right hand and scpeter with left hand.
Photos from a coin sold by Classical Numismatic Group, link to the sale and their website: https://www.cngcoins.com/Coin.aspx?CoinID=357207.
Weight and diameter information from the illustrated example. The imitate type is the RIC 10. The appearance of the coin does not allow to conclude that it is a coin ''fourree''. Gravity tests could reveal that this coin is fourree. Here are the explanations and references given by Classical Numismatic Group:
''Ex Dr. Allan Smith Collection (Triton XXI, 9 January 2018), lot 728; Estate of Dr. Robert B. Beckett, Jr. (Classical Numismatic Group 105, 10 May 2017), lot 839; Superior Galleries (3 December 1999), lot 1732; Frederick S. Knobloch Collection (Stack's, 1 May 1980), lot 277.
This is a "subtle" fourrée, which was only recently determined by a specific gravity test (9.50), and not recognized as such in any of its previous auction appearances''