Let's analyse stamp by stamp:
The 30c
You say :
- White paper
- Watermark 182
What we can see: perforations: 13 teeth vertically
It can ONLY be a Zumstein Nr 68C or 68D (Michel 60XC or 60YC)
The watermark 182 is existing in 2 types : Wmk 1 & Wmk 2
The Wmk 1 has a cross with large wings / the Wmk 2 thin ones
Catalogue value : with Wmk 1: 60 EUR/ with Wmk 2: from 2 to 7 EUR

The 3Fr
You say :
- White paper
- Maybe Watermark 183 ( a lot of time, Wmk 182 is not directly visible on the stamp, even if it is a pressed mark)
What we can see: perforations: 13 teeth vertically
If you cannot determinate the Wmk type ( with lighter gas), it can ONLY be
- either Zumstein 92A (Wmk 183) CV: Michel #80C = 150 EUR
- or Zumstein 72D (Wmk 182-type2- thin wings) CV: Michel #64YC = 30 EUR
- or Zumstein 72C (Wmk 182-type1- large wings) CV: Michel #64XC = 16000 EUR
So, you can see, for finding the catalogue value, how important is the determination of the type of Wmk.