This is as good as you will ever find. Urea Formalderyde thermo setting material (Bakelite type material) No fading or damage to the case and still with the original diagram paster's. This came on an ivory GPO 162 dated 1934 and I have split it up to sell this separately. No splits, damage or repairs to the cover. You can see the slightest difference where it had a telephone sat on top. The line in has a small chip on the underside location completely unseen. The only markings are TE 10. There may be other markings under the paster's but I will not remove them. These are so rare to find in the condition and so you may have been waiting decades for one. No pictures yet but it is genuine and in wonderful condition. It comes on a working and tested GPO No25 chassis PX 36 crossed through and printed No26. No line in cord.