The pens in Red, Green and Beige:

Cap detail; the cap's plastic top with the Swan emblem looks really nice IMHO.

Swan logo closeup, and clip marking:

The cap imprint:

The Barrel imprint: "SWAN" WARWICK, MADE IN INDIA

The Nib and the section threads:

Nib Closeup, showing the Swan logo, the "D" shaped breather hole, What does the K after 3 mean?

Nib underside:

The section has a nipple, so the pen could be made a squeeze type filler also?

Hope you liked the pens. More information on the Warwick and other Indian SWAN models is welcome.
Cheers,
Hari