Here is a link to Tradex that shows what Husqvarna M98 made by FN they have. Many are drilled for top mounts, side mounts or both. I bought a total of 7 for me and my friends that had not been drilled and tapped. I also bought a properly drilled, for top mount, mod. 640, 9.3x62, with swept back bolt handle on which we fitted a Leupold VX-3 2.5-8x36.Will take it to the range soon.

https://www.tradeexcanada.com/search/node/Husqvarna%20m98

You can also search for FN98 but the FN action does not have the thumb cut on the left wall or the hump with the stripper clip guides found on the original period rifles. Unfortunately Tradex has recently stopped exporting to the US market. Keep checking Simpsons as new stock arrives.

Husqvarna 640 (1947) has thumb cut , hump and low swept back bolt handle of the Deluxe.

146 (1939) next to 640 (1948) transitional with hump but no thumb cut. Smooth as glass.