WW1 R.G.A 4th Siege Battery Royal Garrison Artillery OBS Fire Slide Rule C1917
£165
A Nice Original WW1 R.G.A 4th Siege Battery Royal Garrison Artillery OBS of Fire Slide Rule Dated C1917 In Fitted Leather Case. A lovely WW1 item to add to any collection. (see photos). The leather case is 48cm by 6cm by 1.5cm.
