Pipedia Dunhill Dating Guide: Difference between revisions

Pipedia Dunhill Dating Guide (view source)

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→‎PAT. No. 5861/12.119708/17

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 ====PAT. No. 5861/12.119708/17====
 <span style="color:#800000">['''1918 up to 1926''']</span> Patents for Dunhill's [https://pipedia.org/images/2/2d/Screen_Shot_2563-06-24_at_11.24.38.png Oil Treatment/Sandblasting] and [https://pipedia.org/images/d/d1/PA3104-900x900.jpg Inner Tubes], registered in '''England'''.<br>
+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'''.
+* Possessive stamp: DUNHILL'S "SHELL BRIAR"
+* Sometimes stamped '''119708/17.5861/12''' instead 5861/12.119708/17.
+ 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''']].
+<br>
+<div class="separator" style="clear: both; text-align: center;"></div>
+----
+====PAT. No. 119708117.116989/17====
+<span style="color:#800000">['''1927 up to 1931''']</span> Patents for Dunhill's [https://pipedia.org/images/2/2d/Screen_Shot_2563-06-24_at_11.24.38.png Oil Treatment/Sandblasting] and [https://pipedia.org/images/d/d1/PA3104-900x900.jpg Inner Tubes], registered in '''England'''.<br>
 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).