Vintage Glass Fluted Large Christmas Ornaments - Germany

These amazing glass ornaments are unusually large, measuring approximately 5” long - they are all in vintage condition, with discolouration, oxidation, paint chips and crazing - I think there is a hairline crack on one, to see it zoom in on the measurement pic showing length - the swirls are covered in tiny little circles and some are falling off From searches, these appear to be very old german made mercury glass ornaments, possibly even 1920’s but I can’t confirm due to minimal information online for these exact ornaments. Light can be seen through the ornaments, the glass is so thin & delicate I had to do a heated pin test to see if they were light plastic & pin did not go through! Amazing collection of 4 ornaments - no marking that I can find Please see all pics to see condition (zoom in) & measurements Please comment any questions as I try to fully & accurately disclose all details Including a vintage storage box, box has price markings