You may want to have a look at this post.
In red we marked how the original 1957 price of $150 would have changed had it followed monetary inflation only. The math is simple behind this one. If we adjust the original $150 price from 1957 with inflation to 2014 US Dollars, we end up with a price of $1,265 while the watch actually costs $7,500 today.
So with answers like “Probably around $200. Adjusted for inflation, they cost about 5 times more today then before.”
Whilst in the 1970s it would cost 14.2 x average income, in 2012 this had reduced to less than 7 times average income.