There are three variations.
* An accurate replica of the Fender Telecaster from the 60's era i.e. a "true copy" This model has two pickups similar to the Fender.
* The other two variations differ mainly in the number of pickups. I do not know what the original model numbers were, so I refer to them as "Type 1" (1 pickup) and "Type 2" (2 pickups) These are not official designations but are useful in easily distinguishing between the two.
"True" Telecaster Copy
Single-Pickup (Type-1)
This model has a single pickup, hence no need for switches. It is a very simple and clean design.
Dual-Pickup (Type 2)
Two pickups with switching for the multiple pickups. They appear to be two position switches which might be simply ON/OFF for each pickup. There is a tremolo but many examples have it removed. These cheap tremolos never stay in tune anyway.