To avoid threadjacking Trumpy's thread:
Sweden had a different numbering scheme. i think they used the same dialing scheme as Austria, Don't know when Austria changed though. Must have been around 1960 I think, along with the letter phone numbers being converted to standard ones.
From the beginnings of telephone until the 1920ies Vienna phone numbers were just in the 12672 format. Then numbers like U 25 368 were introduced.
Phones back then lokked like that:
Siemens & Halske, 1920
You can see 0 comes before 1 on the dial so the pulse count is always number+1.
Around 1960 the numbers were changed to 6 and 7 digit numbers without letters. Single lines had 6 digit numbers, party lines were seven digits, the first 6 digits being identical to all subscribers on one line (the maximum being ten, while in the cities no more than four subscribers were on one line).
The W48 phones I've been talking about:
Here you can see all colors they were ever made in, though ordinary people _never_ got others than chamois and black. The green ones were supposedly produced specially for Palmers, a big underwear chain. Every picture is a link that shows you a bigger picture. The light green one has the original hardwired box, the red and the dark green ones have the later phone jack that was used until the early 1990ies. http://www.telephonmuseum.at/verschiedenes/bakelit1.htm
Party line phones were around until 2001!
Party line phone:
The right-hand push button was the earth button to obtain a line. The disc in the front was the line busy indicator.