2015 heralds the Year of the Portugieser with IWC's debut of an Annual Calendar model fitted with the spanking new in-house 52850 calibre, which took engineers five years to develop.

2015 heralds the Year of the Portugieser with IWC's debut of an Annual Calendar model fitted with the spanking new in-house 52850 calibre, which took engineers five years to develop.

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