I figure that being as everyone's quarentined and cooped up, now would be a good time to inquire about this "Lactone" bottle. Nothing online, no info from the few bottle guys I know from my region. It's weird because the bottles I see online with the ten pin shape tend to be much older looking (early 1800s to 1850s), but the embossing on this looks like its from the 1890s or 1900s. Bottom's conclave and perfectly smooth mimus a manufacturing defect. As a bonus I've included a pic of another example I found that came up broken.