There are 2 designs of indica whose face value is "bulk rate". They are:

Stylized eagle	design U180	You have identified design #U180 printed in dark carmine and blue on white paper and shared by Scott #s U636 ("USA/Bulk/Rate") and U650 ("USA/Presorted/Standard").
Star	design U173	You have identified design #U173 diagnostic for Scott # U628 (printed in red & blue on white paper).