its a general assumption that all se5a were pc-10 but anything is possible. there are many differing opinions on what pc-10 and/or pc-12 are. most regard pc-10 to be brownish green or greenish brown if you prefer, but there are those who say its chocolate brown. pc-12 however is generally thought to be a reddish brown but there are those who say pc-12 is chocolate brown. so are they even different? i think yes, but who really knows except guys who are dead. why not add some olive green to some brown and make your own shade.its what i do. one thing all agree on is that british aero coatings of the great war varied due to the mixture(diff manufacturers mixed their own shade) and that it degraded fast so just about any shade of greenish brown could not be considered wrong.