They come with quite a pedigree. It actually uses a typeface by Dutch designer Albert-Jan Pool based on DIN 1451, a typeface dating back to 1931. In fact, DIN 1451 was used on road signage in Germany and on German car number plates from 1956. So something of a 20th century classic and a typeface included in the Museum of Modern Art in New York.
The actual numbers are made in the UK, crafted from oak and available in numbers as well as lower case letters. Just in case your house is one of those with a 'name'. They have also been UV lacquered for long life, although they will 'age' with the weather and sunlight over time.
Not cheap at £18.49 each, but these should be with you and your own home for the long haul.