I picked up this beautiful saw this morning . There’s no medallion as later saws have . There’s no dot between Cast and Steel , from what I can see . I was guessing pre 1830 because of the lack of medallion . (?) The trademark also lacks the word “ improved “ as later trademarks seem to have . It does say “refined “ opposite the “ Cast Steel “ I’m just wondering if anyone has more information to share . Thank you in advance , as always .