Sorry haven`t been able to get back to this !! Allergies giving me fits with all the pollen flying !! Will try to get back this afternoon !!

Finally got to look around bit between sneezing bouts !! I found many that were for sale approx. same size and era !! But very few that actually sold !! Found one lamp on ebay that was similar and it had some serious watchers priced at $199. and that’s about what yours should sell for each !! But there is no way to outguess the buying public !!
And to explain the “Blanc de Chine” wording !! That was part of the marketing strategy !! I mean it simply means “white from china” but we know it was made right here in the USA. !! Now if you were a shopper back in the fifties which would you buy given similar prices ?? A lamp that was just white porcelain or one that sounded exotic with the French name “Blanc de Chine”!! Remember that back then they would have to save up to purchase many of these things !! Most people would not have known what it even meant !! But it sounded like you were doing well indeed when you told the ladies at the Bridge Club that they were Blanc de Chine lamps !!