The term means it was a sixty-day Treasury bill; that means it pays not $100, it would start at $10,000.

期限表示这是六十天期国库券,票面不是100美元,而至少一万美元

耶鲁公开课 - 金融市场课程节选

What if you want to buy a Treasury bill on some other day?

如果想在其他时间购买短期国库券呢

耶鲁公开课 - 金融市场课程节选