Assuming a road or mtb frame it's probably english threaded. If you bring the cups to a shop they should be able to confirm (or if it has 1.37 on it then it's english). Given the frame quality you may want to have the BB shell faced in a shop (this should be cheap) but you may be ok without that.
Edit: Being a 68mm shell you'll need to use the spacers that come with the BB.