It is a Piston fill pen with a fine nib. Make that Extra Fine. Very smooth for such a fine nib. The window is great and the piston makes it even better. Just arrived to me from Mumbai.
Wality/Airmail "Black Beauty" by IvanRomero, on Flickr
Wality/Airmail "Black Beauty" by IvanRomero, on Flickr
Wality/Airmail "Black Beauty" by IvanRomero, on Flickr
Wality/Airmail "Black Beauty" by IvanRomero, on Flickr
Wality/Airmail "Black Beauty" by IvanRomero, on Flickr
Wality/Airmail "Black Beauty" by IvanRomero, on Flickr
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