I had recently bought a 2nd hand Sapphire Radeon HD 6950, and have just used FlashROM to test it.
It has two chips, with the same exact firmware on both (verified via SHA1 hashes):
Pm25LV010 (read from; written to; verified);
Pm25LV010A (read from; written to; verified)
Firmware version: 013.010.000.007.03936