I don't have a Jandy actuator to look at but the switches you have in your post look like two different sizes.
Your top one looks like a medium duty type that mounts in a 1/2" hole.
The bottom one is either a mini (mounts in a 6mm or 1/4" hole) or sub-mini (mounts in a 5mm or
13/64" hole). You may want to double check which size you actually need for the Jandy. I looked at the
Also, I think the switch on my Hayward version has the switch encased in epoxy so replacing it may be very difficult, I am unsure how the Jandy actuator looks like inside. I did look at the manual
http://www.manatron.net/Pdf's/JANDY MANUALS/jva.pdf but it was no help in Id'ing the part size. I also looked at the INYO site (I think that is where you got the picture of the lower one) but it too does not indicate the size.
I will also presume that it functions like mine with the three positions, on/center-off/on.
Here are some I found at much cheaper costs, they do not include any pre-soldered leads
Medium Duty -
DPDT Medium Duty Toggle Center Off
Mini -
DPDT Mini Toggle Switch Center Off
Sub-Mini -
DPDT Sub-Mini Toggle Switch Center Off
I would guess it is the Mini but they are cheap enough at this site to just order both the mini and sub-mini to be safe. The shipping is going to cost you more than the parts

. Total on my end for the mini and sub-mini including shipping was $11.09.
Hope that helps