The Turkish MKEK SR 10 Gaz Maskesi was a licensed copy of the British SR6.  Both of these examples have their filter port on the right cheek to accomodate left handed soldiers.  This example was made by Makina ve Kimya Endüstrisi Kurumu in 1990.

Gaz Maskesi = "Gas Mask"

Makina ve Kimya Endüstrisi Kurumu = "Mechanical and Chemical Industry Company"