Here is a re-issue Fender Esquire. It has 1 lap steel single coil pickup at the bridge.

WHAT THE ESQUIRE’S SELECTOR SWITCH DOES

On the Fender Esquire, the 3-way selector functions as a tone modification router. All three positions select the bridge pickup. It’s where the output of the bridge pickup goes that differs…

In the back position, the pickup is routed directly to the volume pot. This bypasses the 250K resistance of the tone pot, for a brighter sound than the Telecaster circuit would produce at its max brightness.

In the middle position, the pickup is routed through the volume and tone pot, so you get what a regular Telecaster provides in the back position. The only difference with an Esquire here is that it doesn't have a treble bleed capacitor to preserve the highs when you reduce the volume.

In the front position, there’s a heavy filtering arrangement, achieved through a 3.3K resistor and two 0.05 microfarad capacitors. The result is a rounded comp tone that could perhaps be considered to have jazz organ characteristics if you took away the transients and decay.

Some other good information about Esquires at this site:

Fender Esquires