Google 'sica', OP.
Not saying it isn't by any means. But anything short of rusted out Roman weapons are pretty rare.
Very little survived the era. Yes, there are several items, especially from Pompeii which are amazing and in excellent shape. But, for as long as the Romans ruled and the area they ruled in, there is surprisingly little surviving examples. A lot of what we think of as Roman items are interpretations based on educated guesses.