Thanks, Tina. Yes, I'll get around to giving you a final reply on your email from, uh, month ago or so...?

On #1053, you will need to measure the perfs to do the final ID.
#1055 is a nice premium item. Can't tell from your pic, but if it's MNH, the 2009 Scott catalog is $160. You have #1055-1057, but I don't see #1054. Look for #1054. As I mentioned before, you'll get a much better price if you have the complete set (it attracts the speculators). That is one set that will continue to inch upwards, as it is not only issued during the Cultural Revolution, but it has a relatively low print quantity of 2 million sets.
Nice stamps to have, congratulations!

k