B737 - Thumb switches on column

[NW3]

Hi.

I'm doing a JAA ATPL at the moment, with their 'standard' aircraft being something along the lines of a 737. I noticed the other day some switches (of some sort) in the same place as the thumb trim switches, but on the other side (right thumb for captain, left for F/O). They look like three sliders of some sort, but nobody I've asked has any idea what they're for.

Does anyone know? Are they just there for show..... :)

Many thanks in advance,

NW3

[batty]

They were there originaly as a memory aid for Callsigns/FL's etc. Some use them some dont. They are just counters.
See you in Jerez..:D
Good luck with the course.