For Patek Philippe evaluation we utilize a three-tiered pricing system.
Each successive tier provides more detailed information.  

I make my request

€ 50

Whether your watch is a known or an unknown entity in the marketplace
_________________

Whether it is worthwhile for your watch to be further analyzed

I make my request

€ 250

Whether your watch is a known or an unknown entity in the marketplace
_________________

The production period
_________________

The quantity that was produced of your particular watch model
_________________

The quantity of of your particular model known to the market
_________________

Whether your watch has undergone modifications

I make my request

€ 500

Whether your watch is a known or an unknown entity in the marketplace
_________________

The production period
_________________

The quantity that was produced of your particular watch model
_________________

The quantity of the model known to the market
_________________

The quantity of model produced in different metals
_________________

Whether your watch has undergone modifications
_________________

 Details about :  references,  calibers,  cases and dials
_________________

Previous auction sale prices