http://book.klll.cc/ebooks/subject/27825.opds?sort_order=release_date 2026-01-13T16:00:59Z Books about Clocks and watches -- History Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2026-01-13T16:00:59Z https://book.klll.cc/ebooks/50244.opds Die Uhren: Ein Abriß der Geschichte der Zeitmessung (German) Fintan Kindler 2026-01-13T16:00:59Z https://book.klll.cc/ebooks/47928.opds Time Telling through the Ages Harry Chase Brearley