Atkins Ingrid 38 Mast Height

This is a simple query. I'm checking out an old Ingrid 38 here in Mexico and might need to replace the mast.

She is a long ways away from me right now and the mast is mounted so hard to measure. So:

Does anyone here happen to know the mast height of a cutter-rigged Atkins Ingrid 38?

 

The Alajuela 38 cutter is based on Atkin's Ingrid 38, on sailboatdata of the Alajuela 38 it says

‘‘ I = 47.9' / 14.6 m — P = 41.6' / 12.68 m ’’ → rig key on sailboatdata

Rig key on UK Sailmakers' Encyclopedia of Sails — 1.3 - Rig Dimensions

‘‘ I = measured along the front of mast from the highest halyard to the main deck. The main deck is where the deck would be if there were no deckhouse. ’’

‘‘ P = the luff length of the main-sail, measured along the aft face of the mast from the top of the boom to the highest point that the mainsail can be hoisted. ’’

( the shown rig key images tell ‘‘deckhouse’’ is also meaning cabin there )

Both linked rig key images show "I" as the height from the deck to the point of the (jib) forestay attachment, but when looking at "I" vs "P" on the Alajuela 38 it looks to me like "I" is the height from the deck to the shown yankee stay attachment.

 

Thank you. I doubt the Ingrid is exactly the same as the Alajuela, but no doubt it's close, and I should have thought to take a look at that one on that site, the entry for the Ingrid having none of the rigging dimensions.
This will do me until I get back there. The owner of another Ingrid (s/v Maitreya) yesterday told me that the mast height for his is 50' from the waterline, so I estimated the mast to deck at around 46' assuming the waterline to the deck at around 4'.
Again, thank you.