30.8, that isn't a common size...
Sizes were 26.8, 27.0, 27.2, 28.6, 29.4 and 31.6
I have a couple of proto hand machines ones in like a 26.4, but these have a machined shaft, like a Syncros, rather than the Easton EA70 taperwall that the production product had. All sizes were available throughout the years. Later posts just used a silver head as the differing material composition of the drawn shaft versus the machined head gave colour shade variations.