No Timing marks?

[OxonCounty77]

Following on from my thread 'flat spot from cold start' :

Tried to check the ign timing following various suggestions that it should be 10 deg or similar. Have found & highlighted the mark on the damper pulley.There appears to be no mark to line it up with. I expected to see a toothed plate on the timing cover,but cant even see where one might have been/broken off etc.Nothing either looking up from underneath.The timing light seems to indicate timing is set towards the passenger side of the cover.(More or less where it is in the picture when the engine was stopped). There is a vertical ridge stamped into the cover pressing towards the driver's side,but that doesnt look right either. Any thoughts welcome.

(PS/ Santa just came to our local garden centre in Bicester Oxfordshire (England) The kiddies will get their presents super-quick this year...)