Hi and welcome
No this is a mid 20th century machine made bottle.
The diamond insignia is the mark of Diamond Glass Company of Pennsylvania.
The numbers around the diamond are manufacturer marks which mean something only to the company workers who came up with their code. One may indicate date but note that it could represent, for example, the xth year of production.
Lastly, the D-126 is an indication of the Calvert brand or Seagrams company. D is short for distiller.
