1948-1990. Used collection complete in the main catalogue numbers. Many early issues already BPP-expertised, including Nos. 1-20 on pieces with Schlegel BPP certificate ("genuine...faultless"), miniature sheet 1 with first-day cancellation and Schlegel BPP certificate ("genuine...faultless"), and Nos. 68-70 with Schlegel BPP photo opinion ("genuine...faultless").