What does the number 50320 mean on the back of the woofer cone?

[mbottz]

An e-bay seller is selling D-130's and says they are reconed as 136's The number on the back of teh cone is 50320. Is this enough to know if it is a 136 cone?

Thanks

[ratitifb]

all my 2231a and 2235 cones have "50320" white mark ink printed on the back (136 and 2231 cones are the same)

But beware that the voice coil glued on your cone is the correct one ... ;)