Primarily, yes...Kevin is correct in his assessment that the 1880s were the hey day of the professionally mfg'd and marked ring style baseball bat. That said, there are plenty of images of teams/players with bats decorated with ring patterns in the 1870s and even as far back as the 1860s.
Here are a couple of images from the 1860s and 1870s that show teams/players with various styles of ring bats...
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