Looking at your second coin with some more attention, i second your association with al-salih isma'il. However, the calligraphy is a bit weird for proper Arab. That coupled with the low weight makes it most likely this is a so called "crusader imitation" of this Ayyubid coin.
Thank you THCoins for your comments. I believe I have found an attribution for the 2nd coin pictured. By entering 1/2 Dirham Ayyubid coins in Google and searching through dozens of links, I believe I have found a match by pattern recognition. It appears that the coin is a 1/2 Dirham of al-Kamil Muhammad I, 1218-1238 (AH 615-635). The first digital image below was the discovery image, followed by a coin from a Stephen Album auction. Trust members will agree with my findings. All comments welcome. Yes THC...I saw references on various links to Crusader imitations...you may very well be correct. As I am not familiar with this series, I am unable to render an opinion either way. SRSNUM Selling on eBay by egynotes_74. ISLAMIC AYYUBID SILVER 1/2 DIRHAM AL KAMIL MOHAMED 1.4G/14MM ( M4 - SV1 ) , RARE ------------------------------------------------------------------------------------------ Stephen Album coin. AYYUBID: al-Kamil Muhammad I, 1218-1238, AR ½ dirham (1.49g), Dimashq, AH615, A-814.1, superb strike, full marginal inscriptions, Extremely Fine, R.