Thank you Gents for sharing your knowledge. I believe you have correctly placed it in the 19th century. I have checked, and indeed this glass does not 'ping'. The foot is 5.4 cm diameter while the flared rim is 5.6 cm. Further, the glass has striations, with at least one imperfection/bubble in the bowl, and when viewed under a magnifying glass, the engraving does indeed look carelessly done.