The Azad Hind stamps were issued by Germany in February 1943 as part of a propaganda effort to encourage the
Azad Hind movement to free India from British rule.
The
entire set consists of 21 stamps -- 9 perforated (Michel suffix "A") and 12 imperforate ("B"). They are of relatively low value, except for the 1+2 Rupee face-value issues.
Those you have are as follows, with catalog values for MH/MNH:
12A+1R -- Michel VI B (3 / 5)
8A+12A -- Michel V B (3 / 5)
1/2 A -- Michel VIII B (3.60 / 6)
2 1/2A+2 1/2A -- Michel III B (3 / 5)
2 1/2 A -- Michel X B (3.60 / 6)