Category:Year of introduction missing
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This category is for articles about products and other items where the article is missing the exact or approximate year of introduction, because it has not been researched, noted in the relevant article, or available in a reliable source. If the year is never likely to be known (e.g. for historical organizations), please use Category:Year of introduction unknown.
Pages in category "Year of introduction missing"
The following 90 pages are in this category, out of 90 total. This list may not reflect recent changes.