Crawford 177/1, Roman Republic, 169-158 BC., Rome mint, PT or TP series, Æ As.
Roman Republic, PT or TP series, Rome mint, ca. 169-158 BC.,
Æ As (28-31 mm / 28,35 g), uncial standard, based on an As of about 31,5 g.,
Obv.: laureate head of Janus, value mark I above.
Rev.: prow of galley right; [ I (mark of value) to right], above, {PT} or {TP} -monogram; [below, ROMA].
Crawford 177/1 (citing 17 specimens in Paris) ; Syd. 353 ; BMC 588 (error) and 632 .