Old Steam Engine

Photo of two hexagrams on an Old Steam Engine is courtesy of Kaká who published it on Flickr. It was shot at the Port of Paranagua, Parana, Brazil. 
Mathieu Struck commented on Kaka’s page in Flickr"

Despite the star of david, Henschel und Sohn AG (see the HuS letters inside the star) are not a jewish manufacturer.

andriz commented:

Well, the use of the six cornered star is not unusual in Hessen (I am living in south of Hessen, Kassel is in the north of Hessen).
E.g. both beer breweries are using this kind of star - and they are definitely not Jewish.

Like a Dreamcatcher

Amazing Six-pointed star glass art  in St Mary's Church, Brazennose Street, Manchester, also known as "The hidden gem". Photo is courtesy of evissa who published it on Flickr and wrote in the caption that the six-pointed star is the Creator's star. Its six points stand for the six days of creation.

polly.jayne commented on evissa picture:

Looks almost like a dreamcatcher: just shows how one symbol can mean many things to many people.

Tetragrammaton Stained Glass

Photo of this Tetragrammaton inside a Star of David stained glass is courtesy of evissa who published it on Flickr under the title Dedicated to King Edward VII (9 November 1841 – 6 May 1910). It was shot at St Ann's Church, Manchester, England.
Tetragrammaton is the Hebrew name of the Lord and it is composed of 4 letters.

I asked my friend Athol Bloomer

Do you know what is the Hebrew Tetragrammaton inside a
Star of David doing on this stained glass in St Ann's
Church, Manchester, England?

He answered:

Yes both Queen Victoria and her son Edward VII are said to have been supporters of British Israelism. It is also said that Prince Albert (father of Edward VII) was really the son of a Jew Baron Moysen who was the lover of his mother.