בידספיריט | 1957 revenues-franked domestic mail: 23-5-1957

1957 revenues-franked domestic mail: 23-5-1957 local TLV business stationary commercial cover from tour operator to hotel, franked 50pr using 1952 series revenue label (Ba-REV.25) apparently accepted - against regulations - both as postage and for printed matter rate (cover unsealed as per pm regulations); otherwise the cover should have been taxed twice the full DO-7 period letter rate of 100pr. Unusual.