5498 Indonesia SG S18 S20 S22 S23 Mint & Used Sheets. Featuring: S18 SG20 S22 S23 (blocks of 10). Some perforation joins are weak. However sarcely found in full sheets. PTS Membership Number: 20113. Find me listed on the IPDA website. 5498 Indonesia SG S18 S20 S22 S23 Mint & Uséd Sheets. Image: 1 out of: 8. Image: 2 out of: 8. Image: 3 out of: 8. Image: 4 out of: 8. Image: 5 out of: 8. Image: 6 out of: 8. Image: 7 out of: 8. Image: 8 out of: 8. Safe & Securely Packaged. All items are sent in sturdy envelopes or heavily padded boxes. We have never had any broken packages or items. Welcome to Blackheath Stamps, my name is Daniel Ardley, and I hope to help you on your philatelic journey. As a member of both the Philatelic Traders Society (PTS) and the Internet Philatelic Dealers Association (IPDA), I bring a wealth of knowledge and expertise to the world of stamp dealing. Passion for All Stamps. At Blackheath Stamps, I take great pride in offering a wide selection of stamps that caters to collectors of all levels. As an active member of the philatelic community, I also administer multiple stamp groups on Facebook, creating a platform where enthusiasts can connect, share their knowledge, and explore the fascinating world of stamps together. Please visit my website if you want to find out more. Note: Items are listed on multiple platforms. Although this is rare, please be aware that this may occur.