Claude
This is a Swiss PTT philatelic booklet rather than a traditional First Day Cover envelope. The front (Image 1) features the minimalist red Swiss cross PTT logo in the upper right on a clean white background. The interior (Image 2) shows four Helvetia stamps depicting Swiss bridges in denominations of 50, 70, 80, and 90 centimes, with a circular cancellation dated 31-7-91 from Bern (BERN) with 'PHILATELIE' text. The left panel contains promotional text in four languages (German, French, Italian, English) encouraging philatelic subscriptions.
Mistral
A philatelic booklet featuring four Swiss Helvetia stamps depicting bridges, with denominations of 50, 70, 80, and 90 centimes. The stamps showcase detailed, colorful illustrations of different bridge structures. The booklet includes multilingual promotional text encouraging philatelic subscriptions, with a circular Bern cancellation dated 31 July 1991 marked 'PHILATELIE.' The cover is plain with a PTT logo and Swiss cross in red and black. The condition appears clean and well-preserved.
(The automatic summaries sometimes misidentify the postmark as part of the cachet artwork.)
