Butterfly motif bookmark for books, blue and red, Showa retro, vintage

Bookmarks
Showa Retro - Popular about 50 years ago.
Unused, but the blue one has some rust on the bottom.
They look very similar, but the blue one has made in TAIWAN written on the back. The red one has nothing.
I received the red one about 50 years ago.
I bought the blue one at an antique shop about 30 years ago.
Blue: Approx. 13.5 cm long, 3.5 cm wide (at butterfly), 3 cm high.
Red: 14.5 cm long, 3.5 cm wide (at butterfly), 2.5 cm high.
Discount available for bundle purchases.
Thank you for looking.