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Pipedia Dunhill Dating Guide: Difference between revisions
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→PAT. No. 5861/12.119708/17
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====PAT. No. 5861/12.119708/17==== | ====PAT. No. 5861/12.119708/17==== | ||
<br> | <span style="color:#800000">['''1918 up to 1926''']</span> Patents for Dunhill's Oil Treatment/Sandblasting and Inner Tube, registered in '''England'''.<br> | ||
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The date code is just after the patent number (sometimes after ENGLAND): '''1920 +: <span style="font-size:small"><u>2</u>, <u>3</u>, <u>4</u>, <u>5</u> and <u>6</u></span>''' (they are smaller and underscored). | |||
* Dunhill formally instituted a one-year pipe guarantee (the "White Spot Guarantee") and in conjunction with that guarantee a date '''code system to date the pipes in 1921'''. | |||
If it doesn't have the date code, it may be from before 1921. Check it out [[#Pre-Date-System|'''here''']]. | |||
Sometimes the patent was stamped without any date code after 1921. See if there are any additional details that can help you figure out an approximate date [[#Triggers|'''here''']]. | |||
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== Pre-Date-System == | == Pre-Date-System == | ||