Check the listing for details. Montserrat 1986 Air Studios $2.30 glossy MASTER PROOF. Listed at 250.00 USD. MONTSERRAT P STAMPS. 1986 Air Studios $2.30 (#642), MASTER PROOF on glossy plastic (for a sharper image than on paper), 90x75mm with positional markings, the printer's archive contained one other glossy plastic master proof in a preliminary state, this one believed to be the only extant final state proof, VF. Shown at 200%. We accept Paypal. Shipping: Domestic buyer to pay a flat fee of $7, to cover Two-Day Priority postage. Foreign buyer to pay a flat fee of $20, to cover First Class registered postage Please note: these are the actual USPS postage costs only; because they are already expensive, we add nothing for materials and labor! We combine shipping for multiple purchases. California residents add 9.5% sales tax. Powered by SixBit's eCommerce Solution