The "main" price lists were released quarterly. There were monthly supplements released post quarterly: 2 months updating previous quarterly....then a new quarterly list. So the "main quarterly" were dated at least one month out from pub date...but w/ supplement data, should be pretty current. I believe the dealers/distributors had to have some way to "ask for" a particular watch model/variant to get it in stock to sell. I believe Bulova would not send out or sale a watch for which there was not a unique bulova model number, which would have been required for both sales and used internally for manufacturing. I doubt Bulova put together a model/variant and then later assigned a unique model number. These unique model numbers have more info than we are seeing. There are patterns which I have not discovered. Perhaps patterns like "the second digit of unique model number referrs to gold color/content" etc... I just made that one up, but you get the idea. They didn't use a random charactor generator to assign these numbers. They mean something for production, sales and record-keeping. I just can't go fishing for the patterns (yet)