Dual interface metallic transaction cards and methods of manufacturing the same

A transaction card configured for contactless and contact transactions, comprising:

• a top metal layer having an upper surface and a bottom surface;
• a magnetic platform comprising:
• a magnetic layer having an upper surface, a bottom surface, and a periphery extending between the bottom surface and the upper surface of the magnetic layer,
• a thermoplastic perimeter layer surrounding the periphery of the magnetic layer,
• a first adhesive layer adhering the upper surface of the magnetic layer to the bottom surface of the top metal layer, and
• a second adhesive layer adhering to the bottom surface of the magnetic layer;
• an antenna package layer adhering to the second adhesive layer;
• and
• a thermoplastic layer having an upper side and a lower side, the upper side of the thermoplastic layer adhering to a side of the antenna package opposite the second adhesive layer.