Astor Buckles
Astor Base Metals Pty Ltd was established in 1957 and sold in 2015. It also traded as Astor Industries, a trading name still operating.
Cygnet
I suspect Cygnet was a brand distributed by Walkers, as I have an example of an identical buckle on both a Cygnet and a Walkers card.
For any comments or questions, please use the Contact page.