cartridges

The cartridge (not bullet) on the left is the .303 British. The cartridge was used by British forces in rifles and machine guns from 1888 until it was supplanted by the 7.62 NATO cartridge in the 1950s. Also, the spelling of the German should be Panzerbuechse. (The "u" should have an umlaut, but "ue" is a correct substitute.) I don't seem to be able to create an umlaut in Flickr.

More T-Gewehr:

The factory was at Bilberry which was the site of the terminus of the Waterford South Railway. On 22nd December 1916 the Waterford News reported that the ladies were at work greasing the machinery and carrying out light work but had not yet commenced making munitions. In 1917 they commenced making cartridges and continue to do so until after the war. The factory closed in the Summer of 1919.

There are a bunch more photos taken by Poole of the factory mainly focussed on the interior and the tracks leading to it.

The OSI 25" is earlier - the terminus is still in use and the Fishguard and Rosslare Railway is not connected across the bridge we see in the background here.

Streetview in 2009 shows lots of rusty factory buildings on the site. The google aerial view says it has been cleared. Streetview from across the river in 2014 shows the cleared site.

In January 1919 the UK government "offered for sale" the munitions factory, along with ones in Manchester and Worcestershire. "Many firms are keenly anxious to buy such established factories, as the cost of labour and scarcity of material will make the building of others very uncertain for some years." From - trove.nla.gov.au/newspaper/article/153001733 5 April 1917 was a Thursday