Hi, i know the more adjustments a watch has the higher the grade. 17j and higher for RR standard.
I was looking in price guides and i noticed the same watch, same grade and movement and jewels but one adjusted to 5 positions and one to 6 positions and 6 position was value a $100 more. Am i reading it wrong or missing something, for can a difference in one position account for the $100. Difference. Thanks to everyone for your imputs as always, art

price guide is only guide and not perfect.
but RR watches do tend to be more expensive

The number of positions a watch is adjusted to are only a small part of the value. Rarity, size, number of jewels and how much the collectors are willing to pay are much more of the Watch Guides listed values.

Adding to Ken's post below, the six position marking began with some early 20th century Illinois Bunn Special models and became universal for RR adjusted watches mad by the surviving watchmakers of the late 30's and after.

Adding to what Dave wrote, it's likely that fewer six-position variants or versions of that watch were produced.
Of course, the book's star system is based on estimated units extant and their availability.

Ken and dave you are both right. I knew about the jewel count, grade and so on. Its the rarity that i might have missed.
ex the same illinois bunn special 21j s18 listed next to each other in the price guide, the 6 position is valued $50 more over the 5 position. Which makes sense to me, for why wouldnt illinois charge a little more for a higher adjusted position watch of the same model grade and jewel. For in that case all watches would high adjusted, am i missing something here lolo art