Ask Moser directly - they will confirm or not.
Can I have my formerly purchased item identified by Moser?
Please send us a product photo and a shot of the company’s logo on the bottom of the product at customerservice@moser-glass.com, fax them at +420 353 449 619 or mail them at the address MOSER, a.s., Kpt. Jaroše 46/19, 360 06 Karlovy Vary, Czech Republic.
The third factory producing this quallity of glass was Mayers Neffe.
Jindrich