Ivan Iordanov writes:

For more than twenty years I have been working on the project Corpus of the Byzantine Seals from Bulgaria. I have documented ca. 3,000 seals so far discovered in the territory of modern Bulgaria. Volume I: The Byzantine Seals with Geographical Names and vol. II: The Byzantine Seals with Family Names are already published. They include ca. 1,200 seals. The text and illustrations are computerized and I suppose they could be used for various purposes including the project SigiDoc!

At the moment I am working on the third volume. Most of the text is ready and almost all illustrations are scanned or made with a digital camera. It will include all the rest (ca. 1800 seals) and will be a compendium starting from the first earliest seal (that of Anastasios) and finishing with the last number 3000. It will follow the models established by Schlumberger and Laurent and our modern colleagues. The seals already published in vol. 1 and 2 will be mentioned with a relevant reference to their publication. So this third volume will be suitable for the project you propose.