Effectively a model 38 with shorter barrel. Always wondered why they continued to offer the 38 when the fancier 34's came out.
Final edition of Walters book ('87) gives no details of any Diana carbines. And the 34 still had the very plain stock. It maybe that 1988 was indeed the year that the 38 type 34's came out along with carbine barrels.
My '88 is the extremely plain version, though.