Help with Dutch hall marks


I have just inherited a pair of Dutch candlesticks
Attached is a photo of the candlesticks and a close up of the hallmarks. To the far right of the close up there is a mark difficult to see which is an axe or hatchet.

I have traced the maker to be Barend van Mecklenburg who was born in Amsterdam in about 1750 but I cannot get any further with the remaining marks.

Any help with more details of the maker, how old they are and , although probably not the correct forum, an idea of there value would be helpful for insurance.

Silver Candlesticks.JPG