The Another/An-other is a frequency dependent fuzz/chopper.
First your signal is fuzzed up and split in two. Half goes to an electronic switch then the output. The other half goes to a frequency divider which divides whatever you play in half (up to 12 times via the “Frequency” rotary switch). That signal then tells the electronic switch when to turn on/off.
The result? A choppy/fuzzy trem/ring mod/divider who’s frequency changes based on what note(s) you’re playing!!!