This coin shows a trace of 'Emmanuel' on the obverse. Our example is a bit confusing since it is overstruck on an earlier coin. Such overstrikes were instrumental in establishing the order of production of each of the anonymous types. There are several other types of Christ folles not shown here but most are relatively common and easily available in poor condition. These folles are usually found worn and crudely struck.
Any coin showing the eyes on the portrait is better than average.
Assembling a collection of these common coins is not difficult but finding an attractive specimen of each type will take some effort. The very convex obverse shows a bust of Christ while the concave reverse shows Alexius and St. Constantine. Collecting the series would be interesting but frustrating until a 'feel' for the various types had been developed. For both sides to be fully struck and clear is somewhat unusual. While not a great coin, this example at least shows some detail of both sides.