Ken,
After some research into the matter, a helpful gentleman at Miyata Cycles informed me that the construction order for this frame was issued on Nov. 31, 1978. The frame would generelly have been built within two weeks from that date.
Dennis young Hotaka, Japan
>>>>> While looking throgh a local Sun City newspaper, I spied a listing for
> a
>>>>> Miyata Professional racing bike. The owner had bought it from a 75 yr
>>> old
>>>>> man, and the new owner had never even straddled it and knew nothing
>>> about
>>>>> bikes. All he wanted was $100 which was what he had in it.
>>>>>
>>>>> Here's what I got:
>>>>> lovely subtle orange Miyata with Tange Champion tubes, beautiful lugs
>>> with
>>>>> cutouts, chrome Shimano vertical dropouts, and drilled BB. Only
> decals
>>>>> identifying model say Super Record. It came with the Dura Ace labeled
>>> Crane
>>>>> derailleur, DA cank with Dyna Drive pedale, DA stem, DA brakes (EX),
> DA
>>> EX
>>>>> hubs with Akai Alesa style rims, DA friction shifters and a 1977
> Brooks
>>> Team
>>>>> Pro. Other than some glazing on the cranks, in lovely condition. I'm
>>>>> assuming the cranks and pedals were a later edition. I figure it for
>>>>> 1977-1978. Also came with set of tublars with SSC bleu rims and DA AX
>>> hubs.
>>>>> And a set of Rhode Gear crochet back gloves, Detto Pietro shoes,
>>> Kirtland
>>>>> Tour pack full of tools. What did I get other than what I think was a
>>> great
>>>>> deal. Who can tell me about the frame. Its as nicely done as a lot
> of
>>>>> super bikes. Guesses on date?
>>>>>
>>>>> Ken Wallace
>>>>> Phoenix, AZ
>>>>>
>>>>>
>>>>> --__--__--