Carwil Type 61

This post will illustrate the differences between the Carwil Type 61 bubble face compass and the more common Airpath bubble face compass. This information is from my 1940 issue of the Airplane Parts and Supplies Catalog No. 101. It appears that the Carwil came first and the Airpath was a later improved model. Here are some pictures from the catalog.

  
Here is the description from the catalog that explains the different models.

I will show some of the differences between the Carwil model and the Airpath. Many of the parts are the same with the biggest difference being the front face appearance. I think this is a 60C even though the name plate says Type 61.

  

Here you can see the unusual compensator , it uses thin rod magnets inserted into drilled holes in a clear plastic block. It uses tiny brass doors to keep the rods in place. If anyone has any instructions for this procedure I would love to see a copy. Here is another shot with the unit removed.

You can see the little doors and the rod magnets.  Now here are a few shots of the later Airpath Compass you can see the difference in the front face.

The top of the back case also has a flat area that the early model does not.

The compensator from the later Airpath is much improved. It allows a much finer adjustment of the magnetic fields.

This side is for E-W adjustment and the other side compensates the N-S direction.

You can see that the later model is much longer and thicker than the original model. I have seen these ground down in a lame attempt to fit the early case. It does not work well.   The front plate is held to the compensator assembly by two small drive screws, then held to the compass by one small screw. I have sen these read Carwil, Airpath, and Taylorcraft.

When I did a Google search for Carwil Type 61 nothing came up maybe this will fix that! If I have time this week I will post some pictures of my antique compasses !