A13. 12x1.25 male spigot down
A13 12×1.25 male spigot down 01B1331034 $13
←reserve on↓ off→ made in Italy by OMG
A13b. 12x1.25 male spigot left
A13b 12×1.25 male spigot left with custom adapter N/A use A13
left is original, right is replacement
Speedbird BP48 and Angel BP48-S, tube frame models made in Taiwan by TYM, use this valve. The 1.25 thread is more coarse than 1.0.
A13b is an A4 plus a custom made adapter, 10×1.00 female to 12×1.25 male thread.