Synchro Compur
Here's an exploded view of a Synchro Compur shutter from a 4x5 technical camera.
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Although this shutter is typical in construction, there are a number of detail variations among Compurs as well as in other brands. Here's a further disassembly for cleaning:


Here are a couple of photos that might help you identify what you're looking at:


Often, without removing the escapement from the shutter, you can clean the speeds up by applying a drop of solvent to the shafts of the Star Wheel and Pallet. The photo below should help you identify them:


You might want to look at the 'text' link below if you're new to this.

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