otto wrote:Thanks Micke - however I'm unclear about whether they were numbered sequentially for each of the same items or every item roland produced. In other words if they started at 1 for every product made than you might have different products with the same serial number which isn't a problem or did they serialize each thing they made consecutively. In other words might a 250555 be an SH3 and a 250556 be an SH1000?
At any rate my SH3 is serial number 270798 (October '74). I've asked another person who is attempting to sell his for $2500 and his serial number is 240476(July '74. If ever product starts out at **0001 than there seem to be at least 798 in existence assuming mine was that last one made :lol: - I'm waiting on serial number information from other people to get a broader scope. On the other hand if other products are intermingled in the serialization it may be impossible to say how many were made.
As far as I understand most, if not all, of Roland keyboard products made in the '70s up to the mid '80s or thereabouts had serial numbers starting at XX0001. This means that different models could share the same serial number (I don't know how often that occured though).
So in theory at least #250555 could be both an SH-1000, SH-3 and even an SH-2000. However, seeing that the SH-1000 was released some 6 to 8 months prior to the SH-3, the chance that this would happen is very small, unless the the production rate for the SH-1000 was extremely slow (not very likely).
I'm pretty sure therefore there ain't no SH-1000 and SH-3 that share the same serial number. On the other hand, there might be an SH-3 and SH-2000 with the same serial# since they went into production around the same time.
EDIT: I forgot to mention that I made that chart. It should be pretty reliable because I've compared it to hundreds of serial numbers from most of the Roland keyboard models made from 1973 to 1985, and they all fit into the chart. I've also compared it to s/n's listed in various Roland service manuals.