Number indicates November 1937 according to the "Early Ford V-8 as Henry Built It". This would make it a 38 motor. Check to see if if the block has the tin sides or it is an all cast iron block.
either 1938 or 1939 from the above site
1937-1940 V8 60 flathead
17 bolts hold on the heads.
Much smaller than the normal flathead V8.
Has full floating bearings.
2.60 x 3.20 bore and stroke.
136 total cubic inch displacement.
1937 engines have tin sided blocks, while '38-'40 are full cast blocks.
Distributor is the same as the '37-'41 full size flatheads.
Two water pumps screw into front engine cover.
Oil pump is built into front main bearing housing.
The head part number, 52-6050, is standard for all 4 years per the "Green Book"
I can't see the area under the exhaust manifolds, but if that block has those tin side features it would be an early '37 block. If it has cast iron sides it would be a later '37 to '38 block because it has the oil filler hole/tube on the cast bell housing, I don't think any '39 blocks were actually made, I believe they used up '37-'38 blocks in '39. '40 V8 60 blocks did not have the oil filler hole cast into the bell housing. The above assumes this is a block cast in the USA. I don't know if the same info applies to blocks that may have been cast in other countries. If anyone can shot holes in what I am saying, please do so. I don't mind being corrected .