ORIGEN MANUSCRIPTS for CONTRA CELSUM
For further detail please see www.tertullian.org/rpearse/manuscripts/origen_contra_celsum.htm

Manuscripts & Date:
1.Codex Vaticanus Graecus 386 - 13th Cent.
2. Codex Parisinus Suppl. 616 - 1340ad
3. Codex Basil. A. iii. 9 - 1565ad
4. Codex Parisinus Graecus 945 - date ???
5. Codex Venetus 44 - 14th Cent.
6. Codex Vaticanus Palatinus Graecus 309 - date ???
7. Codex Ambrosianus I. 119 P inf - date ???
8. Codex Bodleianus Graecus Misa. 21 - date ???
9. New College MS NO. 146 - date ???
10. Codex Venetus 48 - 14th Cent.
11. Codex Ludg. Batav. 17 - date ???
12. Codex Venetus 46 - date ???
13. Codex Parisinus Suppl. 293 - date ???
14. Matrit. 0. 6 - 1555ad
15. Codex Vaticanus Graecus 387 - date ???
16. Codex Vaticanus Ottobianus 3 - date ???
17. Codex Vaticanus Ottobianus 75 - date ???
18. Codex Monac. 64 - date ???
19. Codex Monac. 517 - date ???

Also, long extracts are preserved in the Philocalia.