its a 3 piece adcock acs labled 64 inch it measures a bit shorter unstrung.
Mine uses a 61 inch string from Chad @ recurves.com.
Measure it from string nock to string nock across the belly, then get a string 3 inches shorter than that and twist to brace. Pretty simple and applies to all bows.
Usually 3 inches with the longbows.4 " with the recurve.
cacciatore, I use 3" even with recurves. The 4" can cause a string to be too short for some recurves and doesn't work alot of times. With 3" you can always twist to shorten more, and I find tighter twist make better strings for me.
The AMO was changed, by the way, in the mid 1980's to 3" for either.
My 64" ACS used a 61" string.