TOSOKU Rotary Mode Select Switch DPP01 020 16R 15° step, 20 position

According to data sheet from manufacturer: http://www.tosoku-inc.co.jp/en/product/pdf/code/dp.pdf, 

this rotary switch is DPP01 020 16R

With the small screws the starting and end positions can be adjusted. 

DP-series 

with waterproof adapter (the aluminum disc with double sided tape)

Code Type: Real Binary Code 

Step angle: 15°

Length of shaft: 20mm

What’s the difference between DPP and DPN?

DPP has the waterproof adapter (the aluminum disc with double sided tape)