You are probably right. I did have some spanking new "Pico" chips that did not bootload to Aduino as ISP hooked up as SPI but did bootload with a ZIF Programmer shield. So far, every test on the Gammon Programmer works perfectly
(well, there was one that that got bootloaded on 5 different programmers varying from Lilypad to Uno, it locked up).
Anyhow, if this fails, we can use Gammons fuse reader to nail it, unless jozzy can positively ID the markings.