Heuer Autavia 73633 on the left, 2018 Autavia Jo Siffert on the right- great photo by @heuerfan #josiffert #heuer #autavia #calibre11

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Heuer Autavia 73633 on the left, 2018 Autavia Jo Siffert on the right- great photo by @heuerfan #josiffert #heuer #autavia #calibre11