You can check for old or new glass if you have a black light,,old lead glass will look blue to purple,,newer soda glass will look yellow green under black light !! Also look at the engraving with a magnifying glass,,old glass,,before 1860 or so would have been wheel or hand engraved and you should be able to see individual strokes in the design !! Newer acid etched will be even and consistant over the entire pattern,,no individual stroke lines !! Keep in mind that many German factories were reproducing copies of older glassware after 1890 and into the 20th century !! They are pretty common in the UK and other countries !! That's why we needed to see the pattern as it is on the glass !!
