Hi Lew, you got the nice kerises, now.
Trying to give my opinion ;
1st : Straight Old Keris Dapur Ron Teki with pamor Wos Wutah (Strewn Rice). Similiar with Dapur Kebo Lajer, but this keris has Kembang Kacang and Lambe Gajah. The character of this blade (on iron, pamorwork and some ricikans style), I think this keris came from Kahuripan era. Kahuripan is the kingdom at east Java before Majapahit era (about 12th-13th century).
2nd : Straight Old Keris from Bangkinang Sumatera. Bangkinang is the name of Kingdom which located near from Riau. Usually the keris like this made about 17th-18th century with no pamor or called as Keris Kelengan.
3rd : Straight Old Keris dapur Jalak Ruwuh with no pamor. If it has, I think it just few Wos Wutah. At the centre of this blade (from bottom until the tip) has ricikan (feature) called Ada-ada or Nggigir Sapi. The iron is very smooth and has the smooth fibrous too. I supposed that this keris came from end of Majapahit period (about 14th-15th century). Unfortunately, looks like the Pesi of this keris has change. Perhaps the original pesi has broken. Usually, the pesi of this keris is very thin.
4th : Keris Bali with 9 waves. I think you must change the scabbard with wooden wrangka in order to protecting the Kembang Kacang.
Overall, these are the beautiful keris, specially the #3 keris
Nice !!