בידספיריט | 1948 domestic 2nd rate period

1948 domestic 2nd rate period grace-period taxed PM mail: 8-10-1948 local KEFAR ATA pm cv franked 3pr at the DO-1 pm rate using long tabbed 3m 1948 New Year Ba10 stamp; should have been accepted during the 1st two weeks of period 2 (starting 1 Oct), but was incorrectly charged supplemental tax (twice the deficiency, rounded down for available franking - here 3pr rather than 4pr), marked by rare ”To Pay” 2-line Mandate cachet (Sacher unlisted), and paid using tabbed 1st PD 3pr with left gutters BaPD1 tied by full strike of same-date K-A pmk; unsealed per pm regulations. Est. value $300+