There is no battery to refer in al Agnew pocket watch what type of battery is it?

if you know the movement you can search on how to do this, There normally is a lever or a push pin hold that needs to be pressed down to remove the stem.

Pop the back off the watch with a pocket knife and look, they use so many types of small button batteries it is hard to say, better to look at it and record the battery number.

Easiest way is to take watch to a watch repair, jewelry store, or big box store like Walmart. They can sell you that battery and install it for you.
To determine the battery type, you will need to refer to your manual, or you can try looking on the back of your watch (which sometimes lists the battery type.)

Take your watch to your nearest watch shop and ask them to do it for you.

You can get into difficulty replacing batteries and it is not worth the risk for the small cost saving in doing it yourself.

If you go to Wikipedia and type in "
Joseph Johnson (watch maker)"
you will see there are a number of reference documents listed. The information you look for may be in one of these.

Often with battery powered watches the word "Quartz" will be written on the dial. In the abscent of that you can look at the mechanism inside (typically by removing the case back).

Alternately (this may not be an absolute confirmation) with the winder in neutral position i.e. pressed all the way in, turn the crown (winding button) and if it spins freely it's probably quartz. Because unless it's broken most mechanical watches click as the watch is
wound up (except some automatics which cant be crown wound).

Plus if it's working and left unworn for a few days yet continues to run it's probably quartz.
Please rate this solution.

First -let's check out what type of watch you have. If you push the crown in and it turns freely back and forth with no resistance at all - this is battery driven watch.
If you do the same and feel and hear some clicking and resistance- this is mechanical (spring driven) watch.
Next - the case: Usually all pocket watches have snap-on casebacks. Take an eyeglass and examine the case. Even if you think there is no any grooves or gaps- try to pry it using watchmakers caseback opener (about $5 on ebay).
In case if there are no chance to open caseback - that means you have one of the cases assemblad watch glass fitted last and that means you have to take glass out first and then only to get to the movement.
As you will not be able to get the glass out without braking it, the only solution will be to visit your nearest watchmakers shop and ask for help.

Rate, please.

Measure your original watch battery (diameter and height).
Compare with the cross reference list and find exactly what you want.
List is here: www.battery-info.co.uk/watch-battery-cross-reference.html - 19k - Cached - Similar pages