I've searched and all I come up with are the pics of two styles (one with handles and one without handles) but the same crown and big 'F' markings. There is someone claiming some association with a king Fredrich of denmark or something but without any verified sources I'm thinking that is more 'ebay salesmanship' than fact. but if anyone does have any info feel free to share.
https://imgur.com/gallery/CM2N8oO
https://imgur.com/gallery/CM2N8oO